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Finding the Fourth Proportional to 172,543.65, 238,048.61 and 99,906.90

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Solution

The fourth proportional to 172,543.65, 238,048.61 and 99,906.90 is: 137,835.83

Step by Step Solution

  1. Step 1: Write the proportion equation
    172,543.65 : 238,048.61 = 99,906.90 : x
  2. Step 2: Convert to fraction form
    172,543.65/238,048.61 = 99,906.90/x
  3. Step 3: Cross multiply
    172,543.65x = 238,048.61 × 99,906.90
  4. Step 4: Simplify right side
    172,543.65x = 23,782,696,984.63
  5. Step 5: Solve for x
    x = 23,782,696,984.63/172,543.65
  6. Step 6: Final answer
    x = 137,835.83

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.