Home / 86,506.20-128,899.38-77,073.72

Finding the Fourth Proportional to 86,506.20, 128,899.38 and 77,073.72

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Solution

The fourth proportional to 86,506.20, 128,899.38 and 77,073.72 is: 114,844.42

Step by Step Solution

  1. Step 1: Write the proportion equation
    86,506.20 : 128,899.38 = 77,073.72 : x
  2. Step 2: Convert to fraction form
    86,506.20/128,899.38 = 77,073.72/x
  3. Step 3: Cross multiply
    86,506.20x = 128,899.38 × 77,073.72
  4. Step 4: Simplify right side
    86,506.20x = 9,934,754,722.29
  5. Step 5: Solve for x
    x = 9,934,754,722.29/86,506.20
  6. Step 6: Final answer
    x = 114,844.42

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Why These Related Problems?

These problems maintain the same ratio (1.49) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.