Home / 103,693.10-155,703.68-78,761.30

Finding the Fourth Proportional to 103,693.10, 155,703.68 and 78,761.30

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Solution

The fourth proportional to 103,693.10, 155,703.68 and 78,761.30 is: 118,266.54

Step by Step Solution

  1. Step 1: Write the proportion equation
    103,693.10 : 155,703.68 = 78,761.30 : x
  2. Step 2: Convert to fraction form
    103,693.10/155,703.68 = 78,761.30/x
  3. Step 3: Cross multiply
    103,693.10x = 155,703.68 × 78,761.30
  4. Step 4: Simplify right side
    103,693.10x = 12,263,424,251.58
  5. Step 5: Solve for x
    x = 12,263,424,251.58/103,693.10
  6. Step 6: Final answer
    x = 118,266.54

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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.