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Finding the Fourth Proportional to 86,908.60, 130,557.30 and 83,366.20

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Solution

The fourth proportional to 86,908.60, 130,557.30 and 83,366.20 is: 125,235.78

Step by Step Solution

  1. Step 1: Write the proportion equation
    86,908.60 : 130,557.30 = 83,366.20 : x
  2. Step 2: Convert to fraction form
    86,908.60/130,557.30 = 83,366.20/x
  3. Step 3: Cross multiply
    86,908.60x = 130,557.30 × 83,366.20
  4. Step 4: Simplify right side
    86,908.60x = 10,884,065,983.26
  5. Step 5: Solve for x
    x = 10,884,065,983.26/86,908.60
  6. Step 6: Final answer
    x = 125,235.78

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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.