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Finding the Fourth Proportional to 123,238, 170,068.50 and 66,649.36

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Solution

The fourth proportional to 123,238, 170,068.50 and 66,649.36 is: 91,976.15

Step by Step Solution

  1. Step 1: Write the proportion equation
    123,238 : 170,068.50 = 66,649.36 : x
  2. Step 2: Convert to fraction form
    123,238/170,068.50 = 66,649.36/x
  3. Step 3: Cross multiply
    123,238x = 170,068.50 × 66,649.36
  4. Step 4: Simplify right side
    123,238x = 11,334,956,681.16
  5. Step 5: Solve for x
    x = 11,334,956,681.16/123,238
  6. Step 6: Final answer
    x = 91,976.15

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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.