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Finding the Fourth Proportional to 78,652.91, 117,951.57 and 25,342.76

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Solution

The fourth proportional to 78,652.91, 117,951.57 and 25,342.76 is: 38,005.18

Step by Step Solution

  1. Step 1: Write the proportion equation
    78,652.91 : 117,951.57 = 25,342.76 : x
  2. Step 2: Convert to fraction form
    78,652.91/117,951.57 = 25,342.76/x
  3. Step 3: Cross multiply
    78,652.91x = 117,951.57 × 25,342.76
  4. Step 4: Simplify right side
    78,652.91x = 2,989,217,740.38
  5. Step 5: Solve for x
    x = 2,989,217,740.38/78,652.91
  6. Step 6: Final answer
    x = 38,005.18

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.