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Finding the Fourth Proportional to 172,560.84, 258,628.14 and 72,686.04

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Solution

The fourth proportional to 172,560.84, 258,628.14 and 72,686.04 is: 108,939.29

Step by Step Solution

  1. Step 1: Write the proportion equation
    172,560.84 : 258,628.14 = 72,686.04 : x
  2. Step 2: Convert to fraction form
    172,560.84/258,628.14 = 72,686.04/x
  3. Step 3: Cross multiply
    172,560.84x = 258,628.14 × 72,686.04
  4. Step 4: Simplify right side
    172,560.84x = 18,798,655,329.17
  5. Step 5: Solve for x
    x = 18,798,655,329.17/172,560.84
  6. Step 6: Final answer
    x = 108,939.29

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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.