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Finding the Fourth Proportional to 61,029.79, 91,087.15 and 57,043.96

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Solution

The fourth proportional to 61,029.79, 91,087.15 and 57,043.96 is: 85,138.29

Step by Step Solution

  1. Step 1: Write the proportion equation
    61,029.79 : 91,087.15 = 57,043.96 : x
  2. Step 2: Convert to fraction form
    61,029.79/91,087.15 = 57,043.96/x
  3. Step 3: Cross multiply
    61,029.79x = 91,087.15 × 57,043.96
  4. Step 4: Simplify right side
    61,029.79x = 5,195,971,741.11
  5. Step 5: Solve for x
    x = 5,195,971,741.11/61,029.79
  6. Step 6: Final answer
    x = 85,138.29

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Why These Related Problems?

These problems maintain the same ratio (1.49) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.