Home / 85,280.20-127,929.90-26,115.40

Finding the Fourth Proportional to 85,280.20, 127,929.90 and 26,115.40

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Solution

The fourth proportional to 85,280.20, 127,929.90 and 26,115.40 is: 39,176.04

Step by Step Solution

  1. Step 1: Write the proportion equation
    85,280.20 : 127,929.90 = 26,115.40 : x
  2. Step 2: Convert to fraction form
    85,280.20/127,929.90 = 26,115.40/x
  3. Step 3: Cross multiply
    85,280.20x = 127,929.90 × 26,115.40
  4. Step 4: Simplify right side
    85,280.20x = 3,340,940,510.46
  5. Step 5: Solve for x
    x = 3,340,940,510.46/85,280.20
  6. Step 6: Final answer
    x = 39,176.04

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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.