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Finding the Fourth Proportional to 261,662.23, 392,572.17 and 81,740.39

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Solution

The fourth proportional to 261,662.23, 392,572.17 and 81,740.39 is: 122,635.21

Step by Step Solution

  1. Step 1: Write the proportion equation
    261,662.23 : 392,572.17 = 81,740.39 : x
  2. Step 2: Convert to fraction form
    261,662.23/392,572.17 = 81,740.39/x
  3. Step 3: Cross multiply
    261,662.23x = 392,572.17 × 81,740.39
  4. Step 4: Simplify right side
    261,662.23x = 32,089,003,468.65
  5. Step 5: Solve for x
    x = 32,089,003,468.65/261,662.23
  6. Step 6: Final answer
    x = 122,635.21

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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.