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Finding the Fourth Proportional to 90,251.40, 124,471.40 and 67,643.48

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Solution

The fourth proportional to 90,251.40, 124,471.40 and 67,643.48 is: 93,291.39

Step by Step Solution

  1. Step 1: Write the proportion equation
    90,251.40 : 124,471.40 = 67,643.48 : x
  2. Step 2: Convert to fraction form
    90,251.40/124,471.40 = 67,643.48/x
  3. Step 3: Cross multiply
    90,251.40x = 124,471.40 × 67,643.48
  4. Step 4: Simplify right side
    90,251.40x = 8,419,678,656.47
  5. Step 5: Solve for x
    x = 8,419,678,656.47/90,251.40
  6. Step 6: Final answer
    x = 93,291.39

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.