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Finding the Fourth Proportional to 136,662.72, 205,071.84 and 89,937.60

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Solution

The fourth proportional to 136,662.72, 205,071.84 and 89,937.60 is: 134,957.57

Step by Step Solution

  1. Step 1: Write the proportion equation
    136,662.72 : 205,071.84 = 89,937.60 : x
  2. Step 2: Convert to fraction form
    136,662.72/205,071.84 = 89,937.60/x
  3. Step 3: Cross multiply
    136,662.72x = 205,071.84 × 89,937.60
  4. Step 4: Simplify right side
    136,662.72x = 18,443,669,117.18
  5. Step 5: Solve for x
    x = 18,443,669,117.18/136,662.72
  6. Step 6: Final answer
    x = 134,957.57

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.