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Finding the Fourth Proportional to 100,551.97, 138,664.06 and 67,918.15

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Solution

The fourth proportional to 100,551.97, 138,664.06 and 67,918.15 is: 93,661.08

Step by Step Solution

  1. Step 1: Write the proportion equation
    100,551.97 : 138,664.06 = 67,918.15 : x
  2. Step 2: Convert to fraction form
    100,551.97/138,664.06 = 67,918.15/x
  3. Step 3: Cross multiply
    100,551.97x = 138,664.06 × 67,918.15
  4. Step 4: Simplify right side
    100,551.97x = 9,417,806,426.69
  5. Step 5: Solve for x
    x = 9,417,806,426.69/100,551.97
  6. Step 6: Final answer
    x = 93,661.08

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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.