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Finding the Fourth Proportional to 125,453.61, 173,159.17 and 77,679.81

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Solution

The fourth proportional to 125,453.61, 173,159.17 and 77,679.81 is: 107,218.69

Step by Step Solution

  1. Step 1: Write the proportion equation
    125,453.61 : 173,159.17 = 77,679.81 : x
  2. Step 2: Convert to fraction form
    125,453.61/173,159.17 = 77,679.81/x
  3. Step 3: Cross multiply
    125,453.61x = 173,159.17 × 77,679.81
  4. Step 4: Simplify right side
    125,453.61x = 13,450,971,231.16
  5. Step 5: Solve for x
    x = 13,450,971,231.16/125,453.61
  6. Step 6: Final answer
    x = 107,218.69

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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.