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Finding the Fourth Proportional to 86,757.60, 130,330.80 and 83,215.20

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Solution

The fourth proportional to 86,757.60, 130,330.80 and 83,215.20 is: 125,009.26

Step by Step Solution

  1. Step 1: Write the proportion equation
    86,757.60 : 130,330.80 = 83,215.20 : x
  2. Step 2: Convert to fraction form
    86,757.60/130,330.80 = 83,215.20/x
  3. Step 3: Cross multiply
    86,757.60x = 130,330.80 × 83,215.20
  4. Step 4: Simplify right side
    86,757.60x = 10,845,503,588.16
  5. Step 5: Solve for x
    x = 10,845,503,588.16/86,757.60
  6. Step 6: Final answer
    x = 125,009.26

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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.