Home / 85,775.50-128,521.14-60,691.24

Finding the Fourth Proportional to 85,775.50, 128,521.14 and 60,691.24

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Solution

The fourth proportional to 85,775.50, 128,521.14 and 60,691.24 is: 90,936.31

Step by Step Solution

  1. Step 1: Write the proportion equation
    85,775.50 : 128,521.14 = 60,691.24 : x
  2. Step 2: Convert to fraction form
    85,775.50/128,521.14 = 60,691.24/x
  3. Step 3: Cross multiply
    85,775.50x = 128,521.14 × 60,691.24
  4. Step 4: Simplify right side
    85,775.50x = 7,800,107,352.81
  5. Step 5: Solve for x
    x = 7,800,107,352.81/85,775.50
  6. Step 6: Final answer
    x = 90,936.31

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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.