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Finding the Fourth Proportional to 124,305.80, 186,458.70 and 77,066.60

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Solution

The fourth proportional to 124,305.80, 186,458.70 and 77,066.60 is: 115,599.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    124,305.80 : 186,458.70 = 77,066.60 : x
  2. Step 2: Convert to fraction form
    124,305.80/186,458.70 = 77,066.60/x
  3. Step 3: Cross multiply
    124,305.80x = 186,458.70 × 77,066.60
  4. Step 4: Simplify right side
    124,305.80x = 14,369,738,049.42
  5. Step 5: Solve for x
    x = 14,369,738,049.42/124,305.80
  6. Step 6: Final answer
    x = 115,599.90

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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.