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Finding the Fourth Proportional to 103,900.68, 156,132.39 and 56,550.78

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Solution

The fourth proportional to 103,900.68, 156,132.39 and 56,550.78 is: 84,979.31

Step by Step Solution

  1. Step 1: Write the proportion equation
    103,900.68 : 156,132.39 = 56,550.78 : x
  2. Step 2: Convert to fraction form
    103,900.68/156,132.39 = 56,550.78/x
  3. Step 3: Cross multiply
    103,900.68x = 156,132.39 × 56,550.78
  4. Step 4: Simplify right side
    103,900.68x = 8,829,408,437.76
  5. Step 5: Solve for x
    x = 8,829,408,437.76/103,900.68
  6. Step 6: Final answer
    x = 84,979.31

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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.