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Finding the Fourth Proportional to 158,047.71, 218,185.16 and 122,156.61

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Solution

The fourth proportional to 158,047.71, 218,185.16 and 122,156.61 is: 168,637.43

Step by Step Solution

  1. Step 1: Write the proportion equation
    158,047.71 : 218,185.16 = 122,156.61 : x
  2. Step 2: Convert to fraction form
    158,047.71/218,185.16 = 122,156.61/x
  3. Step 3: Cross multiply
    158,047.71x = 218,185.16 × 122,156.61
  4. Step 4: Simplify right side
    158,047.71x = 26,652,758,887.12
  5. Step 5: Solve for x
    x = 26,652,758,887.12/158,047.71
  6. Step 6: Final answer
    x = 168,637.43

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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.