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Finding the Fourth Proportional to 372,172.80, 558,086.40 and 161,702.40

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Solution

The fourth proportional to 372,172.80, 558,086.40 and 161,702.40 is: 242,478.52

Step by Step Solution

  1. Step 1: Write the proportion equation
    372,172.80 : 558,086.40 = 161,702.40 : x
  2. Step 2: Convert to fraction form
    372,172.80/558,086.40 = 161,702.40/x
  3. Step 3: Cross multiply
    372,172.80x = 558,086.40 × 161,702.40
  4. Step 4: Simplify right side
    372,172.80x = 90,243,910,287.36
  5. Step 5: Solve for x
    x = 90,243,910,287.36/372,172.80
  6. Step 6: Final answer
    x = 242,478.52

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.