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Finding the Fourth Proportional to 172,345.20, 258,542.10 and 54,004.20

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Solution

The fourth proportional to 172,345.20, 258,542.10 and 54,004.20 is: 81,013.91

Step by Step Solution

  1. Step 1: Write the proportion equation
    172,345.20 : 258,542.10 = 54,004.20 : x
  2. Step 2: Convert to fraction form
    172,345.20/258,542.10 = 54,004.20/x
  3. Step 3: Cross multiply
    172,345.20x = 258,542.10 × 54,004.20
  4. Step 4: Simplify right side
    172,345.20x = 13,962,359,276.82
  5. Step 5: Solve for x
    x = 13,962,359,276.82/172,345.20
  6. Step 6: Final answer
    x = 81,013.91

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1.5x scale

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.