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Finding the Fourth Proportional to 104,915.79, 157,374.78 and 83,988.87

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Solution

The fourth proportional to 104,915.79, 157,374.78 and 83,988.87 is: 125,984.18

Step by Step Solution

  1. Step 1: Write the proportion equation
    104,915.79 : 157,374.78 = 83,988.87 : x
  2. Step 2: Convert to fraction form
    104,915.79/157,374.78 = 83,988.87/x
  3. Step 3: Cross multiply
    104,915.79x = 157,374.78 × 83,988.87
  4. Step 4: Simplify right side
    104,915.79x = 13,217,729,938.70
  5. Step 5: Solve for x
    x = 13,217,729,938.70/104,915.79
  6. Step 6: Final answer
    x = 125,984.18

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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.