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Finding the Fourth Proportional to 125,973, 173,986.92 and 85,618.80

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Solution

The fourth proportional to 125,973, 173,986.92 and 85,618.80 is: 118,251.94

Step by Step Solution

  1. Step 1: Write the proportion equation
    125,973 : 173,986.92 = 85,618.80 : x
  2. Step 2: Convert to fraction form
    125,973/173,986.92 = 85,618.80/x
  3. Step 3: Cross multiply
    125,973x = 173,986.92 × 85,618.80
  4. Step 4: Simplify right side
    125,973x = 14,896,551,306.10
  5. Step 5: Solve for x
    x = 14,896,551,306.10/125,973
  6. Step 6: Final answer
    x = 118,251.94

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1.5x scale

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.