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Finding the Fourth Proportional to 125,699.60, 188,549.40 and 120,861.20

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Solution

The fourth proportional to 125,699.60, 188,549.40 and 120,861.20 is: 181,291.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    125,699.60 : 188,549.40 = 120,861.20 : x
  2. Step 2: Convert to fraction form
    125,699.60/188,549.40 = 120,861.20/x
  3. Step 3: Cross multiply
    125,699.60x = 188,549.40 × 120,861.20
  4. Step 4: Simplify right side
    125,699.60x = 22,788,306,743.28
  5. Step 5: Solve for x
    x = 22,788,306,743.28/125,699.60
  6. Step 6: Final answer
    x = 181,291.80

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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.