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Finding the Fourth Proportional to 143,959.57, 198,655.17 and 79,429.57

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Solution

The fourth proportional to 143,959.57, 198,655.17 and 79,429.57 is: 109,607.82

Step by Step Solution

  1. Step 1: Write the proportion equation
    143,959.57 : 198,655.17 = 79,429.57 : x
  2. Step 2: Convert to fraction form
    143,959.57/198,655.17 = 79,429.57/x
  3. Step 3: Cross multiply
    143,959.57x = 198,655.17 × 79,429.57
  4. Step 4: Simplify right side
    143,959.57x = 15,779,094,731.38
  5. Step 5: Solve for x
    x = 15,779,094,731.38/143,959.57
  6. Step 6: Final answer
    x = 109,607.82

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.