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Finding the Fourth Proportional to 65,433.97, 98,148.88 and 18,686.80

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Solution

The fourth proportional to 65,433.97, 98,148.88 and 18,686.80 is: 28,029.61

Step by Step Solution

  1. Step 1: Write the proportion equation
    65,433.97 : 98,148.88 = 18,686.80 : x
  2. Step 2: Convert to fraction form
    65,433.97/98,148.88 = 18,686.80/x
  3. Step 3: Cross multiply
    65,433.97x = 98,148.88 × 18,686.80
  4. Step 4: Simplify right side
    65,433.97x = 1,834,088,490.78
  5. Step 5: Solve for x
    x = 1,834,088,490.78/65,433.97
  6. Step 6: Final answer
    x = 28,029.61

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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.