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Finding the Fourth Proportional to 74,961.80, 112,485.90 and 28,248.20

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Solution

The fourth proportional to 74,961.80, 112,485.90 and 28,248.20 is: 42,388.58

Step by Step Solution

  1. Step 1: Write the proportion equation
    74,961.80 : 112,485.90 = 28,248.20 : x
  2. Step 2: Convert to fraction form
    74,961.80/112,485.90 = 28,248.20/x
  3. Step 3: Cross multiply
    74,961.80x = 112,485.90 × 28,248.20
  4. Step 4: Simplify right side
    74,961.80x = 3,177,524,200.38
  5. Step 5: Solve for x
    x = 3,177,524,200.38/74,961.80
  6. Step 6: Final answer
    x = 42,388.58

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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.