Home / 78,769.05-118,171.20-28,848.15

Finding the Fourth Proportional to 78,769.05, 118,171.20 and 28,848.15

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Solution

The fourth proportional to 78,769.05, 118,171.20 and 28,848.15 is: 43,278.68

Step by Step Solution

  1. Step 1: Write the proportion equation
    78,769.05 : 118,171.20 = 28,848.15 : x
  2. Step 2: Convert to fraction form
    78,769.05/118,171.20 = 28,848.15/x
  3. Step 3: Cross multiply
    78,769.05x = 118,171.20 × 28,848.15
  4. Step 4: Simplify right side
    78,769.05x = 3,409,020,503.28
  5. Step 5: Solve for x
    x = 3,409,020,503.28/78,769.05
  6. Step 6: Final answer
    x = 43,278.68

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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.