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Finding the Fourth Proportional to 125,173, 172,753.20 and 71,465.68

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Solution

The fourth proportional to 125,173, 172,753.20 and 71,465.68 is: 98,630.89

Step by Step Solution

  1. Step 1: Write the proportion equation
    125,173 : 172,753.20 = 71,465.68 : x
  2. Step 2: Convert to fraction form
    125,173/172,753.20 = 71,465.68/x
  3. Step 3: Cross multiply
    125,173x = 172,753.20 × 71,465.68
  4. Step 4: Simplify right side
    125,173x = 12,345,924,910.18
  5. Step 5: Solve for x
    x = 12,345,924,910.18/125,173
  6. Step 6: Final answer
    x = 98,630.89

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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.