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Finding the Fourth Proportional to 106,891.38, 147,555.54 and 66,625.20

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Solution

The fourth proportional to 106,891.38, 147,555.54 and 66,625.20 is: 91,971.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    106,891.38 : 147,555.54 = 66,625.20 : x
  2. Step 2: Convert to fraction form
    106,891.38/147,555.54 = 66,625.20/x
  3. Step 3: Cross multiply
    106,891.38x = 147,555.54 × 66,625.20
  4. Step 4: Simplify right side
    106,891.38x = 9,830,917,363.61
  5. Step 5: Solve for x
    x = 9,830,917,363.61/106,891.38
  6. Step 6: Final answer
    x = 91,971.10

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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.