Home / 129,245.04-178,356.60-72,666

Finding the Fourth Proportional to 129,245.04, 178,356.60 and 72,666

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Solution

The fourth proportional to 129,245.04, 178,356.60 and 72,666 is: 100,278.21

Step by Step Solution

  1. Step 1: Write the proportion equation
    129,245.04 : 178,356.60 = 72,666 : x
  2. Step 2: Convert to fraction form
    129,245.04/178,356.60 = 72,666/x
  3. Step 3: Cross multiply
    129,245.04x = 178,356.60 × 72,666
  4. Step 4: Simplify right side
    129,245.04x = 12,960,460,695.60
  5. Step 5: Solve for x
    x = 12,960,460,695.60/129,245.04
  6. Step 6: Final answer
    x = 100,278.21

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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.