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Finding the Fourth Proportional to 66,400.80, 99,514.80 and 58,970.40

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Solution

The fourth proportional to 66,400.80, 99,514.80 and 58,970.40 is: 88,378.87

Step by Step Solution

  1. Step 1: Write the proportion equation
    66,400.80 : 99,514.80 = 58,970.40 : x
  2. Step 2: Convert to fraction form
    66,400.80/99,514.80 = 58,970.40/x
  3. Step 3: Cross multiply
    66,400.80x = 99,514.80 × 58,970.40
  4. Step 4: Simplify right side
    66,400.80x = 5,868,427,561.92
  5. Step 5: Solve for x
    x = 5,868,427,561.92/66,400.80
  6. Step 6: Final answer
    x = 88,378.87

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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.