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Finding the Fourth Proportional to 65,166.72, 89,937.65 and 39,688.02

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Solution

The fourth proportional to 65,166.72, 89,937.65 and 39,688.02 is: 54,774.08

Step by Step Solution

  1. Step 1: Write the proportion equation
    65,166.72 : 89,937.65 = 39,688.02 : x
  2. Step 2: Convert to fraction form
    65,166.72/89,937.65 = 39,688.02/x
  3. Step 3: Cross multiply
    65,166.72x = 89,937.65 × 39,688.02
  4. Step 4: Simplify right side
    65,166.72x = 3,569,447,251.95
  5. Step 5: Solve for x
    x = 3,569,447,251.95/65,166.72
  6. Step 6: Final answer
    x = 54,774.08

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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.