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Finding the Fourth Proportional to 268,513.30, 402,518.40 and 90,895.96

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Solution

The fourth proportional to 268,513.30, 402,518.40 and 90,895.96 is: 136,258.79

Step by Step Solution

  1. Step 1: Write the proportion equation
    268,513.30 : 402,518.40 = 90,895.96 : x
  2. Step 2: Convert to fraction form
    268,513.30/402,518.40 = 90,895.96/x
  3. Step 3: Cross multiply
    268,513.30x = 402,518.40 × 90,895.96
  4. Step 4: Simplify right side
    268,513.30x = 36,587,296,385.66
  5. Step 5: Solve for x
    x = 36,587,296,385.66/268,513.30
  6. Step 6: Final answer
    x = 136,258.79

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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.