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Finding the Fourth Proportional to 103,972.80, 155,959.20 and 97,411.80

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Solution

The fourth proportional to 103,972.80, 155,959.20 and 97,411.80 is: 146,117.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    103,972.80 : 155,959.20 = 97,411.80 : x
  2. Step 2: Convert to fraction form
    103,972.80/155,959.20 = 97,411.80/x
  3. Step 3: Cross multiply
    103,972.80x = 155,959.20 × 97,411.80
  4. Step 4: Simplify right side
    103,972.80x = 15,192,266,398.56
  5. Step 5: Solve for x
    x = 15,192,266,398.56/103,972.80
  6. Step 6: Final answer
    x = 146,117.70

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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.