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Finding the Fourth Proportional to 77,152.68, 115,596.90 and 42,116.88

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Solution

The fourth proportional to 77,152.68, 115,596.90 and 42,116.88 is: 63,103.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    77,152.68 : 115,596.90 = 42,116.88 : x
  2. Step 2: Convert to fraction form
    77,152.68/115,596.90 = 42,116.88/x
  3. Step 3: Cross multiply
    77,152.68x = 115,596.90 × 42,116.88
  4. Step 4: Simplify right side
    77,152.68x = 4,868,580,765.67
  5. Step 5: Solve for x
    x = 4,868,580,765.67/77,152.68
  6. Step 6: Final answer
    x = 63,103.20

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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.