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Finding the Fourth Proportional to 109,673.38, 151,359.42 and 66,642.90

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Solution

The fourth proportional to 109,673.38, 151,359.42 and 66,642.90 is: 91,973.38

Step by Step Solution

  1. Step 1: Write the proportion equation
    109,673.38 : 151,359.42 = 66,642.90 : x
  2. Step 2: Convert to fraction form
    109,673.38/151,359.42 = 66,642.90/x
  3. Step 3: Cross multiply
    109,673.38x = 151,359.42 × 66,642.90
  4. Step 4: Simplify right side
    109,673.38x = 10,087,031,131.11
  5. Step 5: Solve for x
    x = 10,087,031,131.11/109,673.38
  6. Step 6: Final answer
    x = 91,973.38

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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.