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Finding the Fourth Proportional to 124,919.80, 187,379.70 and 72,464.20

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Solution

The fourth proportional to 124,919.80, 187,379.70 and 72,464.20 is: 108,696.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    124,919.80 : 187,379.70 = 72,464.20 : x
  2. Step 2: Convert to fraction form
    124,919.80/187,379.70 = 72,464.20/x
  3. Step 3: Cross multiply
    124,919.80x = 187,379.70 × 72,464.20
  4. Step 4: Simplify right side
    124,919.80x = 13,578,320,056.74
  5. Step 5: Solve for x
    x = 13,578,320,056.74/124,919.80
  6. Step 6: Final answer
    x = 108,696.30

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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.