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Finding the Fourth Proportional to 143,874.56, 198,547.28 and 79,342.20

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Solution

The fourth proportional to 143,874.56, 198,547.28 and 79,342.20 is: 109,492.45

Step by Step Solution

  1. Step 1: Write the proportion equation
    143,874.56 : 198,547.28 = 79,342.20 : x
  2. Step 2: Convert to fraction form
    143,874.56/198,547.28 = 79,342.20/x
  3. Step 3: Cross multiply
    143,874.56x = 198,547.28 × 79,342.20
  4. Step 4: Simplify right side
    143,874.56x = 15,753,177,900.04
  5. Step 5: Solve for x
    x = 15,753,177,900.04/143,874.56
  6. Step 6: Final answer
    x = 109,492.45

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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.