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Finding the Fourth Proportional to 88,708.70, 133,063.05 and 86,959.10

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Solution

The fourth proportional to 88,708.70, 133,063.05 and 86,959.10 is: 130,438.65

Step by Step Solution

  1. Step 1: Write the proportion equation
    88,708.70 : 133,063.05 = 86,959.10 : x
  2. Step 2: Convert to fraction form
    88,708.70/133,063.05 = 86,959.10/x
  3. Step 3: Cross multiply
    88,708.70x = 133,063.05 × 86,959.10
  4. Step 4: Simplify right side
    88,708.70x = 11,571,043,071.26
  5. Step 5: Solve for x
    x = 11,571,043,071.26/88,708.70
  6. Step 6: Final answer
    x = 130,438.65

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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.