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Finding the Fourth Proportional to 103,437.70, 155,156.55 and 68,008.30

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Solution

The fourth proportional to 103,437.70, 155,156.55 and 68,008.30 is: 102,012.45

Step by Step Solution

  1. Step 1: Write the proportion equation
    103,437.70 : 155,156.55 = 68,008.30 : x
  2. Step 2: Convert to fraction form
    103,437.70/155,156.55 = 68,008.30/x
  3. Step 3: Cross multiply
    103,437.70x = 155,156.55 × 68,008.30
  4. Step 4: Simplify right side
    103,437.70x = 10,551,933,199.37
  5. Step 5: Solve for x
    x = 10,551,933,199.37/103,437.70
  6. Step 6: Final answer
    x = 102,012.45

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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.