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Finding the Fourth Proportional to 66,816.80, 92,205.84 and 38,521.76

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Solution

The fourth proportional to 66,816.80, 92,205.84 and 38,521.76 is: 53,159.25

Step by Step Solution

  1. Step 1: Write the proportion equation
    66,816.80 : 92,205.84 = 38,521.76 : x
  2. Step 2: Convert to fraction form
    66,816.80/92,205.84 = 38,521.76/x
  3. Step 3: Cross multiply
    66,816.80x = 92,205.84 × 38,521.76
  4. Step 4: Simplify right side
    66,816.80x = 3,551,931,239.08
  5. Step 5: Solve for x
    x = 3,551,931,239.08/66,816.80
  6. Step 6: Final answer
    x = 53,159.25

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.