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Finding the Fourth Proportional to 129,891.60, 179,284.32 and 84,681.72

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Solution

The fourth proportional to 129,891.60, 179,284.32 and 84,681.72 is: 116,882.88

Step by Step Solution

  1. Step 1: Write the proportion equation
    129,891.60 : 179,284.32 = 84,681.72 : x
  2. Step 2: Convert to fraction form
    129,891.60/179,284.32 = 84,681.72/x
  3. Step 3: Cross multiply
    129,891.60x = 179,284.32 × 84,681.72
  4. Step 4: Simplify right side
    129,891.60x = 15,182,104,586.63
  5. Step 5: Solve for x
    x = 15,182,104,586.63/129,891.60
  6. Step 6: Final answer
    x = 116,882.88

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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.