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Finding the Fourth Proportional to 103,947.30, 155,531.70 and 74,030.70

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Solution

The fourth proportional to 103,947.30, 155,531.70 and 74,030.70 is: 110,768.83

Step by Step Solution

  1. Step 1: Write the proportion equation
    103,947.30 : 155,531.70 = 74,030.70 : x
  2. Step 2: Convert to fraction form
    103,947.30/155,531.70 = 74,030.70/x
  3. Step 3: Cross multiply
    103,947.30x = 155,531.70 × 74,030.70
  4. Step 4: Simplify right side
    103,947.30x = 11,514,120,623.19
  5. Step 5: Solve for x
    x = 11,514,120,623.19/103,947.30
  6. Step 6: Final answer
    x = 110,768.83

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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.