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Finding the Fourth Proportional to 53,744.40, 80,443.80 and 28,721.76

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Solution

The fourth proportional to 53,744.40, 80,443.80 and 28,721.76 is: 42,990.29

Step by Step Solution

  1. Step 1: Write the proportion equation
    53,744.40 : 80,443.80 = 28,721.76 : x
  2. Step 2: Convert to fraction form
    53,744.40/80,443.80 = 28,721.76/x
  3. Step 3: Cross multiply
    53,744.40x = 80,443.80 × 28,721.76
  4. Step 4: Simplify right side
    53,744.40x = 2,310,487,517.09
  5. Step 5: Solve for x
    x = 2,310,487,517.09/53,744.40
  6. Step 6: Final answer
    x = 42,990.29

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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.