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Finding the Fourth Proportional to 261,436.40, 392,117.58 and 83,920.04

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Solution

The fourth proportional to 261,436.40, 392,117.58 and 83,920.04 is: 125,868.18

Step by Step Solution

  1. Step 1: Write the proportion equation
    261,436.40 : 392,117.58 = 83,920.04 : x
  2. Step 2: Convert to fraction form
    261,436.40/392,117.58 = 83,920.04/x
  3. Step 3: Cross multiply
    261,436.40x = 392,117.58 × 83,920.04
  4. Step 4: Simplify right side
    261,436.40x = 32,906,522,998.30
  5. Step 5: Solve for x
    x = 32,906,522,998.30/261,436.40
  6. Step 6: Final answer
    x = 125,868.18

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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.