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Finding the Fourth Proportional to 92,778.76, 127,950.15 and 78,468.59

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Solution

The fourth proportional to 92,778.76, 127,950.15 and 78,468.59 is: 108,215.16

Step by Step Solution

  1. Step 1: Write the proportion equation
    92,778.76 : 127,950.15 = 78,468.59 : x
  2. Step 2: Convert to fraction form
    92,778.76/127,950.15 = 78,468.59/x
  3. Step 3: Cross multiply
    92,778.76x = 127,950.15 × 78,468.59
  4. Step 4: Simplify right side
    92,778.76x = 10,040,068,180.66
  5. Step 5: Solve for x
    x = 10,040,068,180.66/92,778.76
  6. Step 6: Final answer
    x = 108,215.16

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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.