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Finding the Fourth Proportional to 90,951.66, 136,512.81 and 55,959.66

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Solution

The fourth proportional to 90,951.66, 136,512.81 and 55,959.66 is: 83,991.98

Step by Step Solution

  1. Step 1: Write the proportion equation
    90,951.66 : 136,512.81 = 55,959.66 : x
  2. Step 2: Convert to fraction form
    90,951.66/136,512.81 = 55,959.66/x
  3. Step 3: Cross multiply
    90,951.66x = 136,512.81 × 55,959.66
  4. Step 4: Simplify right side
    90,951.66x = 7,639,210,433.24
  5. Step 5: Solve for x
    x = 7,639,210,433.24/90,951.66
  6. Step 6: Final answer
    x = 83,991.98

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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.