Home / 85,562.28-128,455.20-68,704.29

Finding the Fourth Proportional to 85,562.28, 128,455.20 and 68,704.29

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Solution

The fourth proportional to 85,562.28, 128,455.20 and 68,704.29 is: 103,146.19

Step by Step Solution

  1. Step 1: Write the proportion equation
    85,562.28 : 128,455.20 = 68,704.29 : x
  2. Step 2: Convert to fraction form
    85,562.28/128,455.20 = 68,704.29/x
  3. Step 3: Cross multiply
    85,562.28x = 128,455.20 × 68,704.29
  4. Step 4: Simplify right side
    85,562.28x = 8,825,423,312.81
  5. Step 5: Solve for x
    x = 8,825,423,312.81/85,562.28
  6. Step 6: Final answer
    x = 103,146.19

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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.