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Finding the Fourth Proportional to 143,973.20, 215,959.80 and 108,981.20

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Solution

The fourth proportional to 143,973.20, 215,959.80 and 108,981.20 is: 163,471.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    143,973.20 : 215,959.80 = 108,981.20 : x
  2. Step 2: Convert to fraction form
    143,973.20/215,959.80 = 108,981.20/x
  3. Step 3: Cross multiply
    143,973.20x = 215,959.80 × 108,981.20
  4. Step 4: Simplify right side
    143,973.20x = 23,535,558,155.76
  5. Step 5: Solve for x
    x = 23,535,558,155.76/143,973.20
  6. Step 6: Final answer
    x = 163,471.80

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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.