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Finding the Fourth Proportional to 91,710.80, 137,335.80 and 73,278.80

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Solution

The fourth proportional to 91,710.80, 137,335.80 and 73,278.80 is: 109,734.11

Step by Step Solution

  1. Step 1: Write the proportion equation
    91,710.80 : 137,335.80 = 73,278.80 : x
  2. Step 2: Convert to fraction form
    91,710.80/137,335.80 = 73,278.80/x
  3. Step 3: Cross multiply
    91,710.80x = 137,335.80 × 73,278.80
  4. Step 4: Simplify right side
    91,710.80x = 10,063,802,621.04
  5. Step 5: Solve for x
    x = 10,063,802,621.04/91,710.80
  6. Step 6: Final answer
    x = 109,734.11

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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.