Home / 129,241.28-178,357.10-78,263.52

Finding the Fourth Proportional to 129,241.28, 178,357.10 and 78,263.52

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Solution

The fourth proportional to 129,241.28, 178,357.10 and 78,263.52 is: 108,006.16

Step by Step Solution

  1. Step 1: Write the proportion equation
    129,241.28 : 178,357.10 = 78,263.52 : x
  2. Step 2: Convert to fraction form
    129,241.28/178,357.10 = 78,263.52/x
  3. Step 3: Cross multiply
    129,241.28x = 178,357.10 × 78,263.52
  4. Step 4: Simplify right side
    129,241.28x = 13,958,854,462.99
  5. Step 5: Solve for x
    x = 13,958,854,462.99/129,241.28
  6. Step 6: Final answer
    x = 108,006.16

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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.