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Finding the Fourth Proportional to 125,550, 173,274.40 and 72,558

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Solution

The fourth proportional to 125,550, 173,274.40 and 72,558 is: 100,138.94

Step by Step Solution

  1. Step 1: Write the proportion equation
    125,550 : 173,274.40 = 72,558 : x
  2. Step 2: Convert to fraction form
    125,550/173,274.40 = 72,558/x
  3. Step 3: Cross multiply
    125,550x = 173,274.40 × 72,558
  4. Step 4: Simplify right side
    125,550x = 12,572,443,915.20
  5. Step 5: Solve for x
    x = 12,572,443,915.20/125,550
  6. Step 6: Final answer
    x = 100,138.94

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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.