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Finding the Fourth Proportional to 127,220.20, 190,916.70 and 71,060.20

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Solution

The fourth proportional to 127,220.20, 190,916.70 and 71,060.20 is: 106,638.56

Step by Step Solution

  1. Step 1: Write the proportion equation
    127,220.20 : 190,916.70 = 71,060.20 : x
  2. Step 2: Convert to fraction form
    127,220.20/190,916.70 = 71,060.20/x
  3. Step 3: Cross multiply
    127,220.20x = 190,916.70 × 71,060.20
  4. Step 4: Simplify right side
    127,220.20x = 13,566,578,885.34
  5. Step 5: Solve for x
    x = 13,566,578,885.34/127,220.20
  6. Step 6: Final answer
    x = 106,638.56

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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.