Home / 103,632.90-155,449.35-78,749.70

Finding the Fourth Proportional to 103,632.90, 155,449.35 and 78,749.70

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Solution

The fourth proportional to 103,632.90, 155,449.35 and 78,749.70 is: 118,124.55

Step by Step Solution

  1. Step 1: Write the proportion equation
    103,632.90 : 155,449.35 = 78,749.70 : x
  2. Step 2: Convert to fraction form
    103,632.90/155,449.35 = 78,749.70/x
  3. Step 3: Cross multiply
    103,632.90x = 155,449.35 × 78,749.70
  4. Step 4: Simplify right side
    103,632.90x = 12,241,589,677.70
  5. Step 5: Solve for x
    x = 12,241,589,677.70/103,632.90
  6. Step 6: Final answer
    x = 118,124.55

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1.5x scale

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.