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Finding the Fourth Proportional to 150,679.72, 207,938.82 and 83,611.72

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Solution

The fourth proportional to 150,679.72, 207,938.82 and 83,611.72 is: 115,384.62

Step by Step Solution

  1. Step 1: Write the proportion equation
    150,679.72 : 207,938.82 = 83,611.72 : x
  2. Step 2: Convert to fraction form
    150,679.72/207,938.82 = 83,611.72/x
  3. Step 3: Cross multiply
    150,679.72x = 207,938.82 × 83,611.72
  4. Step 4: Simplify right side
    150,679.72x = 17,386,122,394.97
  5. Step 5: Solve for x
    x = 17,386,122,394.97/150,679.72
  6. Step 6: Final answer
    x = 115,384.62

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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.