Home / 85,816.40-128,724.60-57,822.80

Finding the Fourth Proportional to 85,816.40, 128,724.60 and 57,822.80

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Solution

The fourth proportional to 85,816.40, 128,724.60 and 57,822.80 is: 86,734.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    85,816.40 : 128,724.60 = 57,822.80 : x
  2. Step 2: Convert to fraction form
    85,816.40/128,724.60 = 57,822.80/x
  3. Step 3: Cross multiply
    85,816.40x = 128,724.60 × 57,822.80
  4. Step 4: Simplify right side
    85,816.40x = 7,443,216,800.88
  5. Step 5: Solve for x
    x = 7,443,216,800.88/85,816.40
  6. Step 6: Final answer
    x = 86,734.20

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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.