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Finding the Fourth Proportional to 88,135.65, 131,984.78 and 70,639.65

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Solution

The fourth proportional to 88,135.65, 131,984.78 and 70,639.65 is: 105,784.19

Step by Step Solution

  1. Step 1: Write the proportion equation
    88,135.65 : 131,984.78 = 70,639.65 : x
  2. Step 2: Convert to fraction form
    88,135.65/131,984.78 = 70,639.65/x
  3. Step 3: Cross multiply
    88,135.65x = 131,984.78 × 70,639.65
  4. Step 4: Simplify right side
    88,135.65x = 9,323,358,311.33
  5. Step 5: Solve for x
    x = 9,323,358,311.33/88,135.65
  6. Step 6: Final answer
    x = 105,784.19

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.