Home / 129,437.26-178,581.72-72,837.70

Finding the Fourth Proportional to 129,437.26, 178,581.72 and 72,837.70

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Solution

The fourth proportional to 129,437.26, 178,581.72 and 72,837.70 is: 100,492.56

Step by Step Solution

  1. Step 1: Write the proportion equation
    129,437.26 : 178,581.72 = 72,837.70 : x
  2. Step 2: Convert to fraction form
    129,437.26/178,581.72 = 72,837.70/x
  3. Step 3: Cross multiply
    129,437.26x = 178,581.72 × 72,837.70
  4. Step 4: Simplify right side
    129,437.26x = 13,007,481,746.84
  5. Step 5: Solve for x
    x = 13,007,481,746.84/129,437.26
  6. Step 6: Final answer
    x = 100,492.56

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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.