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Finding the Fourth Proportional to 103,399.58, 155,176.58 and 76,806.98

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Solution

The fourth proportional to 103,399.58, 155,176.58 and 76,806.98 is: 115,267.81

Step by Step Solution

  1. Step 1: Write the proportion equation
    103,399.58 : 155,176.58 = 76,806.98 : x
  2. Step 2: Convert to fraction form
    103,399.58/155,176.58 = 76,806.98/x
  3. Step 3: Cross multiply
    103,399.58x = 155,176.58 × 76,806.98
  4. Step 4: Simplify right side
    103,399.58x = 11,918,643,316.61
  5. Step 5: Solve for x
    x = 11,918,643,316.61/103,399.58
  6. Step 6: Final answer
    x = 115,267.81

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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.