Home / 86,983.20-130,114.35-81,669.60

Finding the Fourth Proportional to 86,983.20, 130,114.35 and 81,669.60

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Solution

The fourth proportional to 86,983.20, 130,114.35 and 81,669.60 is: 122,165.97

Step by Step Solution

  1. Step 1: Write the proportion equation
    86,983.20 : 130,114.35 = 81,669.60 : x
  2. Step 2: Convert to fraction form
    86,983.20/130,114.35 = 81,669.60/x
  3. Step 3: Cross multiply
    86,983.20x = 130,114.35 × 81,669.60
  4. Step 4: Simplify right side
    86,983.20x = 10,626,386,918.76
  5. Step 5: Solve for x
    x = 10,626,386,918.76/86,983.20
  6. Step 6: Final answer
    x = 122,165.97

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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.