Home / 103,639.35-155,367.90-70,251.15

Finding the Fourth Proportional to 103,639.35, 155,367.90 and 70,251.15

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Solution

The fourth proportional to 103,639.35, 155,367.90 and 70,251.15 is: 105,314.96

Step by Step Solution

  1. Step 1: Write the proportion equation
    103,639.35 : 155,367.90 = 70,251.15 : x
  2. Step 2: Convert to fraction form
    103,639.35/155,367.90 = 70,251.15/x
  3. Step 3: Cross multiply
    103,639.35x = 155,367.90 × 70,251.15
  4. Step 4: Simplify right side
    103,639.35x = 10,914,773,648.09
  5. Step 5: Solve for x
    x = 10,914,773,648.09/103,639.35
  6. Step 6: Final answer
    x = 105,314.96

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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.