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Finding the Fourth Proportional to 119,349.61, 164,706.69 and 65,638.78

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Solution

The fourth proportional to 119,349.61, 164,706.69 and 65,638.78 is: 90,583.84

Step by Step Solution

  1. Step 1: Write the proportion equation
    119,349.61 : 164,706.69 = 65,638.78 : x
  2. Step 2: Convert to fraction form
    119,349.61/164,706.69 = 65,638.78/x
  3. Step 3: Cross multiply
    119,349.61x = 164,706.69 × 65,638.78
  4. Step 4: Simplify right side
    119,349.61x = 10,811,146,189.44
  5. Step 5: Solve for x
    x = 10,811,146,189.44/119,349.61
  6. Step 6: Final answer
    x = 90,583.84

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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.