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Finding the Fourth Proportional to 268,973.70, 403,460.55 and 91,680.90

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Solution

The fourth proportional to 268,973.70, 403,460.55 and 91,680.90 is: 137,521.35

Step by Step Solution

  1. Step 1: Write the proportion equation
    268,973.70 : 403,460.55 = 91,680.90 : x
  2. Step 2: Convert to fraction form
    268,973.70/403,460.55 = 91,680.90/x
  3. Step 3: Cross multiply
    268,973.70x = 403,460.55 × 91,680.90
  4. Step 4: Simplify right side
    268,973.70x = 36,989,626,338.50
  5. Step 5: Solve for x
    x = 36,989,626,338.50/268,973.70
  6. Step 6: Final answer
    x = 137,521.35

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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.