Home / 103,632.85-155,449.28-78,749.65

Finding the Fourth Proportional to 103,632.85, 155,449.28 and 78,749.65

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Solution

The fourth proportional to 103,632.85, 155,449.28 and 78,749.65 is: 118,124.48

Step by Step Solution

  1. Step 1: Write the proportion equation
    103,632.85 : 155,449.28 = 78,749.65 : x
  2. Step 2: Convert to fraction form
    103,632.85/155,449.28 = 78,749.65/x
  3. Step 3: Cross multiply
    103,632.85x = 155,449.28 × 78,749.65
  4. Step 4: Simplify right side
    103,632.85x = 12,241,575,999.00
  5. Step 5: Solve for x
    x = 12,241,575,999.00/103,632.85
  6. Step 6: Final answer
    x = 118,124.48

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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.