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Finding the Fourth Proportional to 55,965.20, 83,947.80 and 20,900.30

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Solution

The fourth proportional to 55,965.20, 83,947.80 and 20,900.30 is: 31,350.45

Step by Step Solution

  1. Step 1: Write the proportion equation
    55,965.20 : 83,947.80 = 20,900.30 : x
  2. Step 2: Convert to fraction form
    55,965.20/83,947.80 = 20,900.30/x
  3. Step 3: Cross multiply
    55,965.20x = 83,947.80 × 20,900.30
  4. Step 4: Simplify right side
    55,965.20x = 1,754,534,204.34
  5. Step 5: Solve for x
    x = 1,754,534,204.34/55,965.20
  6. Step 6: Final answer
    x = 31,350.45

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Similar ratio
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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.