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Finding the Fourth Proportional to 268,973.40, 403,343.46 and 91,432.80

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Solution

The fourth proportional to 268,973.40, 403,343.46 and 91,432.80 is: 137,109.55

Step by Step Solution

  1. Step 1: Write the proportion equation
    268,973.40 : 403,343.46 = 91,432.80 : x
  2. Step 2: Convert to fraction form
    268,973.40/403,343.46 = 91,432.80/x
  3. Step 3: Cross multiply
    268,973.40x = 403,343.46 × 91,432.80
  4. Step 4: Simplify right side
    268,973.40x = 36,878,821,909.49
  5. Step 5: Solve for x
    x = 36,878,821,909.49/268,973.40
  6. Step 6: Final answer
    x = 137,109.55

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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.