Home / 138,013.89-190,446.60-79,860.57

Finding the Fourth Proportional to 138,013.89, 190,446.60 and 79,860.57

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Solution

The fourth proportional to 138,013.89, 190,446.60 and 79,860.57 is: 110,200.32

Step by Step Solution

  1. Step 1: Write the proportion equation
    138,013.89 : 190,446.60 = 79,860.57 : x
  2. Step 2: Convert to fraction form
    138,013.89/190,446.60 = 79,860.57/x
  3. Step 3: Cross multiply
    138,013.89x = 190,446.60 × 79,860.57
  4. Step 4: Simplify right side
    138,013.89x = 15,209,175,222.76
  5. Step 5: Solve for x
    x = 15,209,175,222.76/138,013.89
  6. Step 6: Final answer
    x = 110,200.32

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.