Home / 72,981.20-100,714.05-39,447.20

Finding the Fourth Proportional to 72,981.20, 100,714.05 and 39,447.20

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Solution

The fourth proportional to 72,981.20, 100,714.05 and 39,447.20 is: 54,437.13

Step by Step Solution

  1. Step 1: Write the proportion equation
    72,981.20 : 100,714.05 = 39,447.20 : x
  2. Step 2: Convert to fraction form
    72,981.20/100,714.05 = 39,447.20/x
  3. Step 3: Cross multiply
    72,981.20x = 100,714.05 × 39,447.20
  4. Step 4: Simplify right side
    72,981.20x = 3,972,886,769.59
  5. Step 5: Solve for x
    x = 3,972,886,769.59/72,981.20
  6. Step 6: Final answer
    x = 54,437.13

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.