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Finding the Fourth Proportional to 125,089.14, 172,649.80 and 79,756.68

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Solution

The fourth proportional to 125,089.14, 172,649.80 and 79,756.68 is: 110,081.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    125,089.14 : 172,649.80 = 79,756.68 : x
  2. Step 2: Convert to fraction form
    125,089.14/172,649.80 = 79,756.68/x
  3. Step 3: Cross multiply
    125,089.14x = 172,649.80 × 79,756.68
  4. Step 4: Simplify right side
    125,089.14x = 13,769,974,850.66
  5. Step 5: Solve for x
    x = 13,769,974,850.66/125,089.14
  6. Step 6: Final answer
    x = 110,081.30

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.