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Finding the Fourth Proportional to 71,328.50, 98,436.29 and 39,497.40

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Solution

The fourth proportional to 71,328.50, 98,436.29 and 39,497.40 is: 54,508.05

Step by Step Solution

  1. Step 1: Write the proportion equation
    71,328.50 : 98,436.29 = 39,497.40 : x
  2. Step 2: Convert to fraction form
    71,328.50/98,436.29 = 39,497.40/x
  3. Step 3: Cross multiply
    71,328.50x = 98,436.29 × 39,497.40
  4. Step 4: Simplify right side
    71,328.50x = 3,887,977,324.31
  5. Step 5: Solve for x
    x = 3,887,977,324.31/71,328.50
  6. Step 6: Final answer
    x = 54,508.05

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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.