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Finding the Fourth Proportional to 143,615.75, 198,060.71 and 89,905.65

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Solution

The fourth proportional to 143,615.75, 198,060.71 and 89,905.65 is: 123,989.03

Step by Step Solution

  1. Step 1: Write the proportion equation
    143,615.75 : 198,060.71 = 89,905.65 : x
  2. Step 2: Convert to fraction form
    143,615.75/198,060.71 = 89,905.65/x
  3. Step 3: Cross multiply
    143,615.75x = 198,060.71 × 89,905.65
  4. Step 4: Simplify right side
    143,615.75x = 17,806,776,422.48
  5. Step 5: Solve for x
    x = 17,806,776,422.48/143,615.75
  6. Step 6: Final answer
    x = 123,989.03

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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.