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Finding the Fourth Proportional to 61,309.44, 91,917.28 and 28,006.40

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Solution

The fourth proportional to 61,309.44, 91,917.28 and 28,006.40 is: 41,988.19

Step by Step Solution

  1. Step 1: Write the proportion equation
    61,309.44 : 91,917.28 = 28,006.40 : x
  2. Step 2: Convert to fraction form
    61,309.44/91,917.28 = 28,006.40/x
  3. Step 3: Cross multiply
    61,309.44x = 91,917.28 × 28,006.40
  4. Step 4: Simplify right side
    61,309.44x = 2,574,272,110.59
  5. Step 5: Solve for x
    x = 2,574,272,110.59/61,309.44
  6. Step 6: Final answer
    x = 41,988.19

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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.