Home / 86,820.30-130,230.45-78,785.10

Finding the Fourth Proportional to 86,820.30, 130,230.45 and 78,785.10

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Solution

The fourth proportional to 86,820.30, 130,230.45 and 78,785.10 is: 118,177.65

Step by Step Solution

  1. Step 1: Write the proportion equation
    86,820.30 : 130,230.45 = 78,785.10 : x
  2. Step 2: Convert to fraction form
    86,820.30/130,230.45 = 78,785.10/x
  3. Step 3: Cross multiply
    86,820.30x = 130,230.45 × 78,785.10
  4. Step 4: Simplify right side
    86,820.30x = 10,260,219,026.30
  5. Step 5: Solve for x
    x = 10,260,219,026.30/86,820.30
  6. Step 6: Final answer
    x = 118,177.65

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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.