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Finding the Fourth Proportional to 91,479.40, 137,000.40 and 73,983.40

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Solution

The fourth proportional to 91,479.40, 137,000.40 and 73,983.40 is: 110,798.23

Step by Step Solution

  1. Step 1: Write the proportion equation
    91,479.40 : 137,000.40 = 73,983.40 : x
  2. Step 2: Convert to fraction form
    91,479.40/137,000.40 = 73,983.40/x
  3. Step 3: Cross multiply
    91,479.40x = 137,000.40 × 73,983.40
  4. Step 4: Simplify right side
    91,479.40x = 10,135,755,393.36
  5. Step 5: Solve for x
    x = 10,135,755,393.36/91,479.40
  6. Step 6: Final answer
    x = 110,798.23

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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.