Home / 129,316.40-178,429.89-75,591.02

Finding the Fourth Proportional to 129,316.40, 178,429.89 and 75,591.02

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Solution

The fourth proportional to 129,316.40, 178,429.89 and 75,591.02 is: 104,299.98

Step by Step Solution

  1. Step 1: Write the proportion equation
    129,316.40 : 178,429.89 = 75,591.02 : x
  2. Step 2: Convert to fraction form
    129,316.40/178,429.89 = 75,591.02/x
  3. Step 3: Cross multiply
    129,316.40x = 178,429.89 × 75,591.02
  4. Step 4: Simplify right side
    129,316.40x = 13,487,697,383.59
  5. Step 5: Solve for x
    x = 13,487,697,383.59/129,316.40
  6. Step 6: Final answer
    x = 104,299.98

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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.