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Finding the Fourth Proportional to 91,520.88, 137,031.64 and 69,266.94

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Solution

The fourth proportional to 91,520.88, 137,031.64 and 69,266.94 is: 103,711.44

Step by Step Solution

  1. Step 1: Write the proportion equation
    91,520.88 : 137,031.64 = 69,266.94 : x
  2. Step 2: Convert to fraction form
    91,520.88/137,031.64 = 69,266.94/x
  3. Step 3: Cross multiply
    91,520.88x = 137,031.64 × 69,266.94
  4. Step 4: Simplify right side
    91,520.88x = 9,491,762,385.98
  5. Step 5: Solve for x
    x = 9,491,762,385.98/91,520.88
  6. Step 6: Final answer
    x = 103,711.44

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1.5x scale

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.