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Finding the Fourth Proportional to 55,973.20, 83,959.80 and 20,908.30

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Solution

The fourth proportional to 55,973.20, 83,959.80 and 20,908.30 is: 31,362.45

Step by Step Solution

  1. Step 1: Write the proportion equation
    55,973.20 : 83,959.80 = 20,908.30 : x
  2. Step 2: Convert to fraction form
    55,973.20/83,959.80 = 20,908.30/x
  3. Step 3: Cross multiply
    55,973.20x = 83,959.80 × 20,908.30
  4. Step 4: Simplify right side
    55,973.20x = 1,755,456,686.34
  5. Step 5: Solve for x
    x = 1,755,456,686.34/55,973.20
  6. Step 6: Final answer
    x = 31,362.45

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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.