Home / 261,159.29-391,739.05-172,392.04

Finding the Fourth Proportional to 261,159.29, 391,739.05 and 172,392.04

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Solution

The fourth proportional to 261,159.29, 391,739.05 and 172,392.04 is: 258,588.13

Step by Step Solution

  1. Step 1: Write the proportion equation
    261,159.29 : 391,739.05 = 172,392.04 : x
  2. Step 2: Convert to fraction form
    261,159.29/391,739.05 = 172,392.04/x
  3. Step 3: Cross multiply
    261,159.29x = 391,739.05 × 172,392.04
  4. Step 4: Simplify right side
    261,159.29x = 67,532,692,018.47
  5. Step 5: Solve for x
    x = 67,532,692,018.47/261,159.29
  6. Step 6: Final answer
    x = 258,588.13

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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.