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Finding the Fourth Proportional to 158,661.72, 218,915.62 and 89,752.77

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Solution

The fourth proportional to 158,661.72, 218,915.62 and 89,752.77 is: 123,837.58

Step by Step Solution

  1. Step 1: Write the proportion equation
    158,661.72 : 218,915.62 = 89,752.77 : x
  2. Step 2: Convert to fraction form
    158,661.72/218,915.62 = 89,752.77/x
  3. Step 3: Cross multiply
    158,661.72x = 218,915.62 × 89,752.77
  4. Step 4: Simplify right side
    158,661.72x = 19,648,284,005.81
  5. Step 5: Solve for x
    x = 19,648,284,005.81/158,661.72
  6. Step 6: Final answer
    x = 123,837.58

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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.