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Finding the Fourth Proportional to 77,382.59, 106,515.96 and 67,799.89

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Solution

The fourth proportional to 77,382.59, 106,515.96 and 67,799.89 is: 93,325.51

Step by Step Solution

  1. Step 1: Write the proportion equation
    77,382.59 : 106,515.96 = 67,799.89 : x
  2. Step 2: Convert to fraction form
    77,382.59/106,515.96 = 67,799.89/x
  3. Step 3: Cross multiply
    77,382.59x = 106,515.96 × 67,799.89
  4. Step 4: Simplify right side
    77,382.59x = 7,221,769,838.66
  5. Step 5: Solve for x
    x = 7,221,769,838.66/77,382.59
  6. Step 6: Final answer
    x = 93,325.51

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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.