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Finding the Fourth Proportional to 71,676.95, 98,768.40 and 55,445.69

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Solution

The fourth proportional to 71,676.95, 98,768.40 and 55,445.69 is: 76,402.28

Step by Step Solution

  1. Step 1: Write the proportion equation
    71,676.95 : 98,768.40 = 55,445.69 : x
  2. Step 2: Convert to fraction form
    71,676.95/98,768.40 = 55,445.69/x
  3. Step 3: Cross multiply
    71,676.95x = 98,768.40 × 55,445.69
  4. Step 4: Simplify right side
    71,676.95x = 5,476,282,127.20
  5. Step 5: Solve for x
    x = 5,476,282,127.20/71,676.95
  6. Step 6: Final answer
    x = 76,402.28

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.