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Finding the Fourth Proportional to 60,721.20, 91,081.80 and 40,892.40

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Solution

The fourth proportional to 60,721.20, 91,081.80 and 40,892.40 is: 61,338.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    60,721.20 : 91,081.80 = 40,892.40 : x
  2. Step 2: Convert to fraction form
    60,721.20/91,081.80 = 40,892.40/x
  3. Step 3: Cross multiply
    60,721.20x = 91,081.80 × 40,892.40
  4. Step 4: Simplify right side
    60,721.20x = 3,724,553,398.32
  5. Step 5: Solve for x
    x = 3,724,553,398.32/60,721.20
  6. Step 6: Final answer
    x = 61,338.60

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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.