Home / 78,121.65-117,185.36-40,160.75

Finding the Fourth Proportional to 78,121.65, 117,185.36 and 40,160.75

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Solution

The fourth proportional to 78,121.65, 117,185.36 and 40,160.75 is: 60,242.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    78,121.65 : 117,185.36 = 40,160.75 : x
  2. Step 2: Convert to fraction form
    78,121.65/117,185.36 = 40,160.75/x
  3. Step 3: Cross multiply
    78,121.65x = 117,185.36 × 40,160.75
  4. Step 4: Simplify right side
    78,121.65x = 4,706,251,159.89
  5. Step 5: Solve for x
    x = 4,706,251,159.89/78,121.65
  6. Step 6: Final answer
    x = 60,242.60

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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.