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Finding the Fourth Proportional to 111,298.65, 153,645.33 and 63,542.78

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Solution

The fourth proportional to 111,298.65, 153,645.33 and 63,542.78 is: 87,719.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    111,298.65 : 153,645.33 = 63,542.78 : x
  2. Step 2: Convert to fraction form
    111,298.65/153,645.33 = 63,542.78/x
  3. Step 3: Cross multiply
    111,298.65x = 153,645.33 × 63,542.78
  4. Step 4: Simplify right side
    111,298.65x = 9,763,050,633.99
  5. Step 5: Solve for x
    x = 9,763,050,633.99/111,298.65
  6. Step 6: Final answer
    x = 87,719.40

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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.