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Finding the Fourth Proportional to 71,638.08, 98,862.08 and 39,806.40

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Solution

The fourth proportional to 71,638.08, 98,862.08 and 39,806.40 is: 54,933.68

Step by Step Solution

  1. Step 1: Write the proportion equation
    71,638.08 : 98,862.08 = 39,806.40 : x
  2. Step 2: Convert to fraction form
    71,638.08/98,862.08 = 39,806.40/x
  3. Step 3: Cross multiply
    71,638.08x = 98,862.08 × 39,806.40
  4. Step 4: Simplify right side
    71,638.08x = 3,935,343,501.31
  5. Step 5: Solve for x
    x = 3,935,343,501.31/71,638.08
  6. Step 6: Final answer
    x = 54,933.68

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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.