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Finding the Fourth Proportional to 261,387.48, 392,132.27 and 83,880.84

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Solution

The fourth proportional to 261,387.48, 392,132.27 and 83,880.84 is: 125,837.64

Step by Step Solution

  1. Step 1: Write the proportion equation
    261,387.48 : 392,132.27 = 83,880.84 : x
  2. Step 2: Convert to fraction form
    261,387.48/392,132.27 = 83,880.84/x
  3. Step 3: Cross multiply
    261,387.48x = 392,132.27 × 83,880.84
  4. Step 4: Simplify right side
    261,387.48x = 32,892,384,408.41
  5. Step 5: Solve for x
    x = 32,892,384,408.41/261,387.48
  6. Step 6: Final answer
    x = 125,837.64

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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.