Home / 86,905.66-130,450.66-76,974.88

Finding the Fourth Proportional to 86,905.66, 130,450.66 and 76,974.88

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Solution

The fourth proportional to 86,905.66, 130,450.66 and 76,974.88 is: 115,543.96

Step by Step Solution

  1. Step 1: Write the proportion equation
    86,905.66 : 130,450.66 = 76,974.88 : x
  2. Step 2: Convert to fraction form
    86,905.66/130,450.66 = 76,974.88/x
  3. Step 3: Cross multiply
    86,905.66x = 130,450.66 × 76,974.88
  4. Step 4: Simplify right side
    86,905.66x = 10,041,423,899.42
  5. Step 5: Solve for x
    x = 10,041,423,899.42/86,905.66
  6. Step 6: Final answer
    x = 115,543.96

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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.