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Finding the Fourth Proportional to 138,959.68, 207,941.24 and 120,303.90

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Solution

The fourth proportional to 138,959.68, 207,941.24 and 120,303.90 is: 180,024.47

Step by Step Solution

  1. Step 1: Write the proportion equation
    138,959.68 : 207,941.24 = 120,303.90 : x
  2. Step 2: Convert to fraction form
    138,959.68/207,941.24 = 120,303.90/x
  3. Step 3: Cross multiply
    138,959.68x = 207,941.24 × 120,303.90
  4. Step 4: Simplify right side
    138,959.68x = 25,016,142,142.84
  5. Step 5: Solve for x
    x = 25,016,142,142.84/138,959.68
  6. Step 6: Final answer
    x = 180,024.47

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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.