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Finding the Fourth Proportional to 261,225.54, 391,838.72 and 71,688.48

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Solution

The fourth proportional to 261,225.54, 391,838.72 and 71,688.48 is: 107,532.83

Step by Step Solution

  1. Step 1: Write the proportion equation
    261,225.54 : 391,838.72 = 71,688.48 : x
  2. Step 2: Convert to fraction form
    261,225.54/391,838.72 = 71,688.48/x
  3. Step 3: Cross multiply
    261,225.54x = 391,838.72 × 71,688.48
  4. Step 4: Simplify right side
    261,225.54x = 28,090,320,414.11
  5. Step 5: Solve for x
    x = 28,090,320,414.11/261,225.54
  6. Step 6: Final answer
    x = 107,532.83

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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.