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Finding the Fourth Proportional to 173,909.40, 260,864.10 and 85,117.20

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Solution

The fourth proportional to 173,909.40, 260,864.10 and 85,117.20 is: 127,675.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    173,909.40 : 260,864.10 = 85,117.20 : x
  2. Step 2: Convert to fraction form
    173,909.40/260,864.10 = 85,117.20/x
  3. Step 3: Cross multiply
    173,909.40x = 260,864.10 × 85,117.20
  4. Step 4: Simplify right side
    173,909.40x = 22,204,021,772.52
  5. Step 5: Solve for x
    x = 22,204,021,772.52/173,909.40
  6. Step 6: Final answer
    x = 127,675.80

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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.