Home / 138,397.11-190,988.60-77,968.48

Finding the Fourth Proportional to 138,397.11, 190,988.60 and 77,968.48

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Solution

The fourth proportional to 138,397.11, 190,988.60 and 77,968.48 is: 107,596.83

Step by Step Solution

  1. Step 1: Write the proportion equation
    138,397.11 : 190,988.60 = 77,968.48 : x
  2. Step 2: Convert to fraction form
    138,397.11/190,988.60 = 77,968.48/x
  3. Step 3: Cross multiply
    138,397.11x = 190,988.60 × 77,968.48
  4. Step 4: Simplify right side
    138,397.11x = 14,891,089,972.01
  5. Step 5: Solve for x
    x = 14,891,089,972.01/138,397.11
  6. Step 6: Final answer
    x = 107,596.83

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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.