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Finding the Fourth Proportional to 250,385.59, 375,420.30 and 138,144.04

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Solution

The fourth proportional to 250,385.59, 375,420.30 and 138,144.04 is: 207,128.84

Step by Step Solution

  1. Step 1: Write the proportion equation
    250,385.59 : 375,420.30 = 138,144.04 : x
  2. Step 2: Convert to fraction form
    250,385.59/375,420.30 = 138,144.04/x
  3. Step 3: Cross multiply
    250,385.59x = 375,420.30 × 138,144.04
  4. Step 4: Simplify right side
    250,385.59x = 51,862,076,940.01
  5. Step 5: Solve for x
    x = 51,862,076,940.01/250,385.59
  6. Step 6: Final answer
    x = 207,128.84

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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.