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Finding the Fourth Proportional to 172,642.19, 258,998.72 and 72,802.40

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Solution

The fourth proportional to 172,642.19, 258,998.72 and 72,802.40 is: 109,218.54

Step by Step Solution

  1. Step 1: Write the proportion equation
    172,642.19 : 258,998.72 = 72,802.40 : x
  2. Step 2: Convert to fraction form
    172,642.19/258,998.72 = 72,802.40/x
  3. Step 3: Cross multiply
    172,642.19x = 258,998.72 × 72,802.40
  4. Step 4: Simplify right side
    172,642.19x = 18,855,726,753.92
  5. Step 5: Solve for x
    x = 18,855,726,753.92/172,642.19
  6. Step 6: Final answer
    x = 109,218.54

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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.