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Finding the Fourth Proportional to 61,130.72, 84,397.20 and 39,945.44

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Solution

The fourth proportional to 61,130.72, 84,397.20 and 39,945.44 is: 55,148.76

Step by Step Solution

  1. Step 1: Write the proportion equation
    61,130.72 : 84,397.20 = 39,945.44 : x
  2. Step 2: Convert to fraction form
    61,130.72/84,397.20 = 39,945.44/x
  3. Step 3: Cross multiply
    61,130.72x = 84,397.20 × 39,945.44
  4. Step 4: Simplify right side
    61,130.72x = 3,371,283,288.77
  5. Step 5: Solve for x
    x = 3,371,283,288.77/61,130.72
  6. Step 6: Final answer
    x = 55,148.76

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1.5x scale

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.