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Finding the Fourth Proportional to 74,908.80, 112,406.40 and 28,195.20

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Solution

The fourth proportional to 74,908.80, 112,406.40 and 28,195.20 is: 42,309.06

Step by Step Solution

  1. Step 1: Write the proportion equation
    74,908.80 : 112,406.40 = 28,195.20 : x
  2. Step 2: Convert to fraction form
    74,908.80/112,406.40 = 28,195.20/x
  3. Step 3: Cross multiply
    74,908.80x = 112,406.40 × 28,195.20
  4. Step 4: Simplify right side
    74,908.80x = 3,169,320,929.28
  5. Step 5: Solve for x
    x = 3,169,320,929.28/74,908.80
  6. Step 6: Final answer
    x = 42,309.06

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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.