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Finding the Fourth Proportional to 86,719.40, 130,026.30 and 34,065.80

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Solution

The fourth proportional to 86,719.40, 130,026.30 and 34,065.80 is: 51,077.96

Step by Step Solution

  1. Step 1: Write the proportion equation
    86,719.40 : 130,026.30 = 34,065.80 : x
  2. Step 2: Convert to fraction form
    86,719.40/130,026.30 = 34,065.80/x
  3. Step 3: Cross multiply
    86,719.40x = 130,026.30 × 34,065.80
  4. Step 4: Simplify right side
    86,719.40x = 4,429,449,930.54
  5. Step 5: Solve for x
    x = 4,429,449,930.54/86,719.40
  6. Step 6: Final answer
    x = 51,077.96

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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.