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Finding the Fourth Proportional to 111,987.92, 154,543.34 and 61,686.92

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Solution

The fourth proportional to 111,987.92, 154,543.34 and 61,686.92 is: 85,127.96

Step by Step Solution

  1. Step 1: Write the proportion equation
    111,987.92 : 154,543.34 = 61,686.92 : x
  2. Step 2: Convert to fraction form
    111,987.92/154,543.34 = 61,686.92/x
  3. Step 3: Cross multiply
    111,987.92x = 154,543.34 × 61,686.92
  4. Step 4: Simplify right side
    111,987.92x = 9,533,302,651.11
  5. Step 5: Solve for x
    x = 9,533,302,651.11/111,987.92
  6. Step 6: Final answer
    x = 85,127.96

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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.