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Finding the Fourth Proportional to 71,462.90, 98,612.34 and 39,631.70

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Solution

The fourth proportional to 71,462.90, 98,612.34 and 39,631.70 is: 54,688.16

Step by Step Solution

  1. Step 1: Write the proportion equation
    71,462.90 : 98,612.34 = 39,631.70 : x
  2. Step 2: Convert to fraction form
    71,462.90/98,612.34 = 39,631.70/x
  3. Step 3: Cross multiply
    71,462.90x = 98,612.34 × 39,631.70
  4. Step 4: Simplify right side
    71,462.90x = 3,908,174,675.18
  5. Step 5: Solve for x
    x = 3,908,174,675.18/71,462.90
  6. Step 6: Final answer
    x = 54,688.16

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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.