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Finding the Fourth Proportional to 111,572.90, 154,030.65 and 86,023.21

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Solution

The fourth proportional to 111,572.90, 154,030.65 and 86,023.21 is: 118,758.33

Step by Step Solution

  1. Step 1: Write the proportion equation
    111,572.90 : 154,030.65 = 86,023.21 : x
  2. Step 2: Convert to fraction form
    111,572.90/154,030.65 = 86,023.21/x
  3. Step 3: Cross multiply
    111,572.90x = 154,030.65 × 86,023.21
  4. Step 4: Simplify right side
    111,572.90x = 13,250,210,951.39
  5. Step 5: Solve for x
    x = 13,250,210,951.39/111,572.90
  6. Step 6: Final answer
    x = 118,758.33

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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.