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Finding the Fourth Proportional to 61,608.81, 85,013.78 and 45,484.70

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Solution

The fourth proportional to 61,608.81, 85,013.78 and 45,484.70 is: 62,764.18

Step by Step Solution

  1. Step 1: Write the proportion equation
    61,608.81 : 85,013.78 = 45,484.70 : x
  2. Step 2: Convert to fraction form
    61,608.81/85,013.78 = 45,484.70/x
  3. Step 3: Cross multiply
    61,608.81x = 85,013.78 × 45,484.70
  4. Step 4: Simplify right side
    61,608.81x = 3,866,826,180.34
  5. Step 5: Solve for x
    x = 3,866,826,180.34/61,608.81
  6. Step 6: Final answer
    x = 62,764.18

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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.