Home / 87,101.80-130,931.10-80,938.60

Finding the Fourth Proportional to 87,101.80, 130,931.10 and 80,938.60

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Solution

The fourth proportional to 87,101.80, 130,931.10 and 80,938.60 is: 121,666.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    87,101.80 : 130,931.10 = 80,938.60 : x
  2. Step 2: Convert to fraction form
    87,101.80/130,931.10 = 80,938.60/x
  3. Step 3: Cross multiply
    87,101.80x = 130,931.10 × 80,938.60
  4. Step 4: Simplify right side
    87,101.80x = 10,597,379,930.46
  5. Step 5: Solve for x
    x = 10,597,379,930.46/87,101.80
  6. Step 6: Final answer
    x = 121,666.60

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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.