Home / 102,821.20-153,886.20-71,717.20

Finding the Fourth Proportional to 102,821.20, 153,886.20 and 71,717.20

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Solution

The fourth proportional to 102,821.20, 153,886.20 and 71,717.20 is: 107,334.75

Step by Step Solution

  1. Step 1: Write the proportion equation
    102,821.20 : 153,886.20 = 71,717.20 : x
  2. Step 2: Convert to fraction form
    102,821.20/153,886.20 = 71,717.20/x
  3. Step 3: Cross multiply
    102,821.20x = 153,886.20 × 71,717.20
  4. Step 4: Simplify right side
    102,821.20x = 11,036,287,382.64
  5. Step 5: Solve for x
    x = 11,036,287,382.64/102,821.20
  6. Step 6: Final answer
    x = 107,334.75

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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.