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Finding the Fourth Proportional to 100,503.46, 138,696.60 and 55,185.72

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Solution

The fourth proportional to 100,503.46, 138,696.60 and 55,185.72 is: 76,157.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    100,503.46 : 138,696.60 = 55,185.72 : x
  2. Step 2: Convert to fraction form
    100,503.46/138,696.60 = 55,185.72/x
  3. Step 3: Cross multiply
    100,503.46x = 138,696.60 × 55,185.72
  4. Step 4: Simplify right side
    100,503.46x = 7,654,071,732.55
  5. Step 5: Solve for x
    x = 7,654,071,732.55/100,503.46
  6. Step 6: Final answer
    x = 76,157.30

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1.5x scale

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.