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Finding the Fourth Proportional to 91,552.60, 137,425.97 and 81,090.51

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Solution

The fourth proportional to 91,552.60, 137,425.97 and 81,090.51 is: 121,721.74

Step by Step Solution

  1. Step 1: Write the proportion equation
    91,552.60 : 137,425.97 = 81,090.51 : x
  2. Step 2: Convert to fraction form
    91,552.60/137,425.97 = 81,090.51/x
  3. Step 3: Cross multiply
    91,552.60x = 137,425.97 × 81,090.51
  4. Step 4: Simplify right side
    91,552.60x = 11,143,941,994.54
  5. Step 5: Solve for x
    x = 11,143,941,994.54/91,552.60
  6. Step 6: Final answer
    x = 121,721.74

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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.