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Finding the Fourth Proportional to 261,390.13, 392,101.59 and 83,893.21

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Solution

The fourth proportional to 261,390.13, 392,101.59 and 83,893.21 is: 125,845.07

Step by Step Solution

  1. Step 1: Write the proportion equation
    261,390.13 : 392,101.59 = 83,893.21 : x
  2. Step 2: Convert to fraction form
    261,390.13/392,101.59 = 83,893.21/x
  3. Step 3: Cross multiply
    261,390.13x = 392,101.59 × 83,893.21
  4. Step 4: Simplify right side
    261,390.13x = 32,894,658,651.23
  5. Step 5: Solve for x
    x = 32,894,658,651.23/261,390.13
  6. Step 6: Final answer
    x = 125,845.07

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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.