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Finding the Fourth Proportional to 261,439.74, 392,080.86 and 92,937.78

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Solution

The fourth proportional to 261,439.74, 392,080.86 and 92,937.78 is: 139,378.68

Step by Step Solution

  1. Step 1: Write the proportion equation
    261,439.74 : 392,080.86 = 92,937.78 : x
  2. Step 2: Convert to fraction form
    261,439.74/392,080.86 = 92,937.78/x
  3. Step 3: Cross multiply
    261,439.74x = 392,080.86 × 92,937.78
  4. Step 4: Simplify right side
    261,439.74x = 36,439,124,708.89
  5. Step 5: Solve for x
    x = 36,439,124,708.89/261,439.74
  6. Step 6: Final answer
    x = 139,378.68

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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.