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Finding the Fourth Proportional to 158,238.84, 218,606.76 and 103,920.06

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Solution

The fourth proportional to 158,238.84, 218,606.76 and 103,920.06 is: 143,565.43

Step by Step Solution

  1. Step 1: Write the proportion equation
    158,238.84 : 218,606.76 = 103,920.06 : x
  2. Step 2: Convert to fraction form
    158,238.84/218,606.76 = 103,920.06/x
  3. Step 3: Cross multiply
    158,238.84x = 218,606.76 × 103,920.06
  4. Step 4: Simplify right side
    158,238.84x = 22,717,627,615.61
  5. Step 5: Solve for x
    x = 22,717,627,615.61/158,238.84
  6. Step 6: Final answer
    x = 143,565.43

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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.