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Finding the Fourth Proportional to 125,429.88, 173,034.72 and 77,665.80

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Solution

The fourth proportional to 125,429.88, 173,034.72 and 77,665.80 is: 107,142.57

Step by Step Solution

  1. Step 1: Write the proportion equation
    125,429.88 : 173,034.72 = 77,665.80 : x
  2. Step 2: Convert to fraction form
    125,429.88/173,034.72 = 77,665.80/x
  3. Step 3: Cross multiply
    125,429.88x = 173,034.72 × 77,665.80
  4. Step 4: Simplify right side
    125,429.88x = 13,438,879,956.58
  5. Step 5: Solve for x
    x = 13,438,879,956.58/125,429.88
  6. Step 6: Final answer
    x = 107,142.57

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1.5x scale

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.