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Finding the Fourth Proportional to 1,123,274,125.80, 1,681,887,879.90 and 1,123,274,125.80

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Solution

The fourth proportional to 1,123,274,125.80, 1,681,887,879.90 and 1,123,274,125.80 is: 1,681,887,879.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,123,274,125.80 : 1,681,887,879.90 = 1,123,274,125.80 : x
  2. Step 2: Convert to fraction form
    1,123,274,125.80/1,681,887,879.90 = 1,123,274,125.80/x
  3. Step 3: Cross multiply
    1,123,274,125.80x = 1,681,887,879.90 × 1,123,274,125.80
  4. Step 4: Simplify right side
    1,123,274,125.80x = 1,889,221,137,988,288,000
  5. Step 5: Solve for x
    x = 1,889,221,137,988,288,000/1,123,274,125.80
  6. Step 6: Final answer
    x = 1,681,887,879.90

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.