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Finding the Fourth Proportional to 268,496.40, 402,754.32 and 91,020.54

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Solution

The fourth proportional to 268,496.40, 402,754.32 and 91,020.54 is: 136,534.11

Step by Step Solution

  1. Step 1: Write the proportion equation
    268,496.40 : 402,754.32 = 91,020.54 : x
  2. Step 2: Convert to fraction form
    268,496.40/402,754.32 = 91,020.54/x
  3. Step 3: Cross multiply
    268,496.40x = 402,754.32 × 91,020.54
  4. Step 4: Simplify right side
    268,496.40x = 36,658,915,693.73
  5. Step 5: Solve for x
    x = 36,658,915,693.73/268,496.40
  6. Step 6: Final answer
    x = 136,534.11

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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.