Home / 129,560.40-178,756.20-89,285.04

Finding the Fourth Proportional to 129,560.40, 178,756.20 and 89,285.04

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Solution

The fourth proportional to 129,560.40, 178,756.20 and 89,285.04 is: 123,187.75

Step by Step Solution

  1. Step 1: Write the proportion equation
    129,560.40 : 178,756.20 = 89,285.04 : x
  2. Step 2: Convert to fraction form
    129,560.40/178,756.20 = 89,285.04/x
  3. Step 3: Cross multiply
    129,560.40x = 178,756.20 × 89,285.04
  4. Step 4: Simplify right side
    129,560.40x = 15,960,254,467.25
  5. Step 5: Solve for x
    x = 15,960,254,467.25/129,560.40
  6. Step 6: Final answer
    x = 123,187.75

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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.