Home / 85,736.40-128,734.20-66,037.20

Finding the Fourth Proportional to 85,736.40, 128,734.20 and 66,037.20

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Solution

The fourth proportional to 85,736.40, 128,734.20 and 66,037.20 is: 99,155.62

Step by Step Solution

  1. Step 1: Write the proportion equation
    85,736.40 : 128,734.20 = 66,037.20 : x
  2. Step 2: Convert to fraction form
    85,736.40/128,734.20 = 66,037.20/x
  3. Step 3: Cross multiply
    85,736.40x = 128,734.20 × 66,037.20
  4. Step 4: Simplify right side
    85,736.40x = 8,501,246,112.24
  5. Step 5: Solve for x
    x = 8,501,246,112.24/85,736.40
  6. Step 6: Final answer
    x = 99,155.62

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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.