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Finding the Fourth Proportional to 86,910.60, 130,560.30 and 83,368.20

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Solution

The fourth proportional to 86,910.60, 130,560.30 and 83,368.20 is: 125,238.78

Step by Step Solution

  1. Step 1: Write the proportion equation
    86,910.60 : 130,560.30 = 83,368.20 : x
  2. Step 2: Convert to fraction form
    86,910.60/130,560.30 = 83,368.20/x
  3. Step 3: Cross multiply
    86,910.60x = 130,560.30 × 83,368.20
  4. Step 4: Simplify right side
    86,910.60x = 10,884,577,202.46
  5. Step 5: Solve for x
    x = 10,884,577,202.46/86,910.60
  6. Step 6: Final answer
    x = 125,238.78

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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.