Home / 86,821.10-130,231.65-80,600.30

Finding the Fourth Proportional to 86,821.10, 130,231.65 and 80,600.30

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Solution

The fourth proportional to 86,821.10, 130,231.65 and 80,600.30 is: 120,900.45

Step by Step Solution

  1. Step 1: Write the proportion equation
    86,821.10 : 130,231.65 = 80,600.30 : x
  2. Step 2: Convert to fraction form
    86,821.10/130,231.65 = 80,600.30/x
  3. Step 3: Cross multiply
    86,821.10x = 130,231.65 × 80,600.30
  4. Step 4: Simplify right side
    86,821.10x = 10,496,710,059.50
  5. Step 5: Solve for x
    x = 10,496,710,059.50/86,821.10
  6. Step 6: Final answer
    x = 120,900.45

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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.