Home / 135,695.47-187,255.31-81,971.14

Finding the Fourth Proportional to 135,695.47, 187,255.31 and 81,971.14

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Solution

The fourth proportional to 135,695.47, 187,255.31 and 81,971.14 is: 113,117.49

Step by Step Solution

  1. Step 1: Write the proportion equation
    135,695.47 : 187,255.31 = 81,971.14 : x
  2. Step 2: Convert to fraction form
    135,695.47/187,255.31 = 81,971.14/x
  3. Step 3: Cross multiply
    135,695.47x = 187,255.31 × 81,971.14
  4. Step 4: Simplify right side
    135,695.47x = 15,349,531,165.95
  5. Step 5: Solve for x
    x = 15,349,531,165.95/135,695.47
  6. Step 6: Final answer
    x = 113,117.49

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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.