Home / 85,972.20-128,666.70-75,474.60

Finding the Fourth Proportional to 85,972.20, 128,666.70 and 75,474.60

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Solution

The fourth proportional to 85,972.20, 128,666.70 and 75,474.60 is: 112,955.91

Step by Step Solution

  1. Step 1: Write the proportion equation
    85,972.20 : 128,666.70 = 75,474.60 : x
  2. Step 2: Convert to fraction form
    85,972.20/128,666.70 = 75,474.60/x
  3. Step 3: Cross multiply
    85,972.20x = 128,666.70 × 75,474.60
  4. Step 4: Simplify right side
    85,972.20x = 9,711,067,715.82
  5. Step 5: Solve for x
    x = 9,711,067,715.82/85,972.20
  6. Step 6: Final answer
    x = 112,955.91

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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.