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Finding the Fourth Proportional to 153,561.68, 211,915.60 and 89,043.44

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Solution

The fourth proportional to 153,561.68, 211,915.60 and 89,043.44 is: 122,880.23

Step by Step Solution

  1. Step 1: Write the proportion equation
    153,561.68 : 211,915.60 = 89,043.44 : x
  2. Step 2: Convert to fraction form
    153,561.68/211,915.60 = 89,043.44/x
  3. Step 3: Cross multiply
    153,561.68x = 211,915.60 × 89,043.44
  4. Step 4: Simplify right side
    153,561.68x = 18,869,694,013.66
  5. Step 5: Solve for x
    x = 18,869,694,013.66/153,561.68
  6. Step 6: Final answer
    x = 122,880.23

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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.