Home / 86,579.10-129,868.65-81,330.30

Finding the Fourth Proportional to 86,579.10, 129,868.65 and 81,330.30

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Solution

The fourth proportional to 86,579.10, 129,868.65 and 81,330.30 is: 121,995.45

Step by Step Solution

  1. Step 1: Write the proportion equation
    86,579.10 : 129,868.65 = 81,330.30 : x
  2. Step 2: Convert to fraction form
    86,579.10/129,868.65 = 81,330.30/x
  3. Step 3: Cross multiply
    86,579.10x = 129,868.65 × 81,330.30
  4. Step 4: Simplify right side
    86,579.10x = 10,562,256,265.10
  5. Step 5: Solve for x
    x = 10,562,256,265.10/86,579.10
  6. Step 6: Final answer
    x = 121,995.45

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1.5x scale

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.