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Finding the Fourth Proportional to 111,569.40, 154,025.82 and 86,019.71

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Solution

The fourth proportional to 111,569.40, 154,025.82 and 86,019.71 is: 118,753.49

Step by Step Solution

  1. Step 1: Write the proportion equation
    111,569.40 : 154,025.82 = 86,019.71 : x
  2. Step 2: Convert to fraction form
    111,569.40/154,025.82 = 86,019.71/x
  3. Step 3: Cross multiply
    111,569.40x = 154,025.82 × 86,019.71
  4. Step 4: Simplify right side
    111,569.40x = 13,249,255,598.78
  5. Step 5: Solve for x
    x = 13,249,255,598.78/111,569.40
  6. Step 6: Final answer
    x = 118,753.49

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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.