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Finding the Fourth Proportional to 124,390.80, 186,539.76 and 40,129.80

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Solution

The fourth proportional to 124,390.80, 186,539.76 and 40,129.80 is: 60,179.72

Step by Step Solution

  1. Step 1: Write the proportion equation
    124,390.80 : 186,539.76 = 40,129.80 : x
  2. Step 2: Convert to fraction form
    124,390.80/186,539.76 = 40,129.80/x
  3. Step 3: Cross multiply
    124,390.80x = 186,539.76 × 40,129.80
  4. Step 4: Simplify right side
    124,390.80x = 7,485,803,260.85
  5. Step 5: Solve for x
    x = 7,485,803,260.85/124,390.80
  6. Step 6: Final answer
    x = 60,179.72

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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.