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Finding the Fourth Proportional to 125,551, 173,275.78 and 72,559

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Solution

The fourth proportional to 125,551, 173,275.78 and 72,559 is: 100,140.32

Step by Step Solution

  1. Step 1: Write the proportion equation
    125,551 : 173,275.78 = 72,559 : x
  2. Step 2: Convert to fraction form
    125,551/173,275.78 = 72,559/x
  3. Step 3: Cross multiply
    125,551x = 173,275.78 × 72,559
  4. Step 4: Simplify right side
    125,551x = 12,572,717,321.02
  5. Step 5: Solve for x
    x = 12,572,717,321.02/125,551
  6. Step 6: Final answer
    x = 100,140.32

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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.