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Finding the Fourth Proportional to 172,184.88, 257,353.80 and 155,279.28

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Solution

The fourth proportional to 172,184.88, 257,353.80 and 155,279.28 is: 232,086.07

Step by Step Solution

  1. Step 1: Write the proportion equation
    172,184.88 : 257,353.80 = 155,279.28 : x
  2. Step 2: Convert to fraction form
    172,184.88/257,353.80 = 155,279.28/x
  3. Step 3: Cross multiply
    172,184.88x = 257,353.80 × 155,279.28
  4. Step 4: Simplify right side
    172,184.88x = 39,961,712,769.26
  5. Step 5: Solve for x
    x = 39,961,712,769.26/172,184.88
  6. Step 6: Final answer
    x = 232,086.07

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Why These Related Problems?

These problems maintain the same ratio (1.49) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.