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Finding the Fourth Proportional to 103,614.70, 155,422.05 and 81,064.30

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Solution

The fourth proportional to 103,614.70, 155,422.05 and 81,064.30 is: 121,596.45

Step by Step Solution

  1. Step 1: Write the proportion equation
    103,614.70 : 155,422.05 = 81,064.30 : x
  2. Step 2: Convert to fraction form
    103,614.70/155,422.05 = 81,064.30/x
  3. Step 3: Cross multiply
    103,614.70x = 155,422.05 × 81,064.30
  4. Step 4: Simplify right side
    103,614.70x = 12,599,179,687.82
  5. Step 5: Solve for x
    x = 12,599,179,687.82/103,614.70
  6. Step 6: Final answer
    x = 121,596.45

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1.5x scale

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.