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Finding the Fourth Proportional to 125,899.74, 188,762.13 and 55,740.78

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Solution

The fourth proportional to 125,899.74, 188,762.13 and 55,740.78 is: 83,572.44

Step by Step Solution

  1. Step 1: Write the proportion equation
    125,899.74 : 188,762.13 = 55,740.78 : x
  2. Step 2: Convert to fraction form
    125,899.74/188,762.13 = 55,740.78/x
  3. Step 3: Cross multiply
    125,899.74x = 188,762.13 × 55,740.78
  4. Step 4: Simplify right side
    125,899.74x = 10,521,748,360.66
  5. Step 5: Solve for x
    x = 10,521,748,360.66/125,899.74
  6. Step 6: Final answer
    x = 83,572.44

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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.