Home / 72,442.30-108,712.05-42,828.70

Finding the Fourth Proportional to 72,442.30, 108,712.05 and 42,828.70

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Solution

The fourth proportional to 72,442.30, 108,712.05 and 42,828.70 is: 64,271.78

Step by Step Solution

  1. Step 1: Write the proportion equation
    72,442.30 : 108,712.05 = 42,828.70 : x
  2. Step 2: Convert to fraction form
    72,442.30/108,712.05 = 42,828.70/x
  3. Step 3: Cross multiply
    72,442.30x = 108,712.05 × 42,828.70
  4. Step 4: Simplify right side
    72,442.30x = 4,655,995,775.84
  5. Step 5: Solve for x
    x = 4,655,995,775.84/72,442.30
  6. Step 6: Final answer
    x = 64,271.78

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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.