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Finding the Fourth Proportional to 103,862.40, 155,620.80 and 51,158.40

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Solution

The fourth proportional to 103,862.40, 155,620.80 and 51,158.40 is: 76,652.49

Step by Step Solution

  1. Step 1: Write the proportion equation
    103,862.40 : 155,620.80 = 51,158.40 : x
  2. Step 2: Convert to fraction form
    103,862.40/155,620.80 = 51,158.40/x
  3. Step 3: Cross multiply
    103,862.40x = 155,620.80 × 51,158.40
  4. Step 4: Simplify right side
    103,862.40x = 7,961,311,134.72
  5. Step 5: Solve for x
    x = 7,961,311,134.72/103,862.40
  6. Step 6: Final answer
    x = 76,652.49

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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.