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Finding the Fourth Proportional to 71,412.98, 98,555.74 and 39,591.32

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Solution

The fourth proportional to 71,412.98, 98,555.74 and 39,591.32 is: 54,639.25

Step by Step Solution

  1. Step 1: Write the proportion equation
    71,412.98 : 98,555.74 = 39,591.32 : x
  2. Step 2: Convert to fraction form
    71,412.98/98,555.74 = 39,591.32/x
  3. Step 3: Cross multiply
    71,412.98x = 98,555.74 × 39,591.32
  4. Step 4: Simplify right side
    71,412.98x = 3,901,951,248.42
  5. Step 5: Solve for x
    x = 3,901,951,248.42/71,412.98
  6. Step 6: Final answer
    x = 54,639.25

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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.