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Finding the Fourth Proportional to 155,066.76, 213,966.54 and 91,416.87

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Solution

The fourth proportional to 155,066.76, 213,966.54 and 91,416.87 is: 126,140.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    155,066.76 : 213,966.54 = 91,416.87 : x
  2. Step 2: Convert to fraction form
    155,066.76/213,966.54 = 91,416.87/x
  3. Step 3: Cross multiply
    155,066.76x = 213,966.54 × 91,416.87
  4. Step 4: Simplify right side
    155,066.76x = 19,560,151,371.53
  5. Step 5: Solve for x
    x = 19,560,151,371.53/155,066.76
  6. Step 6: Final answer
    x = 126,140.20

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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.