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Finding the Fourth Proportional to 136,925.60, 188,856.24 and 86,576

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Solution

The fourth proportional to 136,925.60, 188,856.24 and 86,576 is: 119,410.96

Step by Step Solution

  1. Step 1: Write the proportion equation
    136,925.60 : 188,856.24 = 86,576 : x
  2. Step 2: Convert to fraction form
    136,925.60/188,856.24 = 86,576/x
  3. Step 3: Cross multiply
    136,925.60x = 188,856.24 × 86,576
  4. Step 4: Simplify right side
    136,925.60x = 16,350,417,834.24
  5. Step 5: Solve for x
    x = 16,350,417,834.24/136,925.60
  6. Step 6: Final answer
    x = 119,410.96

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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.