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Finding the Fourth Proportional to 71,469.92, 98,608.40 and 56,315.60

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Solution

The fourth proportional to 71,469.92, 98,608.40 and 56,315.60 is: 77,699.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    71,469.92 : 98,608.40 = 56,315.60 : x
  2. Step 2: Convert to fraction form
    71,469.92/98,608.40 = 56,315.60/x
  3. Step 3: Cross multiply
    71,469.92x = 98,608.40 × 56,315.60
  4. Step 4: Simplify right side
    71,469.92x = 5,553,191,211.04
  5. Step 5: Solve for x
    x = 5,553,191,211.04/71,469.92
  6. Step 6: Final answer
    x = 77,699.70

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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.