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Finding the Fourth Proportional to 259,101.86, 388,666.70 and 81,622.76

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Solution

The fourth proportional to 259,101.86, 388,666.70 and 81,622.76 is: 122,438.52

Step by Step Solution

  1. Step 1: Write the proportion equation
    259,101.86 : 388,666.70 = 81,622.76 : x
  2. Step 2: Convert to fraction form
    259,101.86/388,666.70 = 81,622.76/x
  3. Step 3: Cross multiply
    259,101.86x = 388,666.70 × 81,622.76
  4. Step 4: Simplify right side
    259,101.86x = 31,724,048,774.09
  5. Step 5: Solve for x
    x = 31,724,048,774.09/259,101.86
  6. Step 6: Final answer
    x = 122,438.52

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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.