Home / 129,293.28-178,421.29-71,929.69

Finding the Fourth Proportional to 129,293.28, 178,421.29 and 71,929.69

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Solution

The fourth proportional to 129,293.28, 178,421.29 and 71,929.69 is: 99,261.06

Step by Step Solution

  1. Step 1: Write the proportion equation
    129,293.28 : 178,421.29 = 71,929.69 : x
  2. Step 2: Convert to fraction form
    129,293.28/178,421.29 = 71,929.69/x
  3. Step 3: Cross multiply
    129,293.28x = 178,421.29 × 71,929.69
  4. Step 4: Simplify right side
    129,293.28x = 12,833,787,453.22
  5. Step 5: Solve for x
    x = 12,833,787,453.22/129,293.28
  6. Step 6: Final answer
    x = 99,261.06

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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.