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Finding the Fourth Proportional to 268,985.60, 403,516.80 and 91,500.80

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Solution

The fourth proportional to 268,985.60, 403,516.80 and 91,500.80 is: 137,264.26

Step by Step Solution

  1. Step 1: Write the proportion equation
    268,985.60 : 403,516.80 = 91,500.80 : x
  2. Step 2: Convert to fraction form
    268,985.60/403,516.80 = 91,500.80/x
  3. Step 3: Cross multiply
    268,985.60x = 403,516.80 × 91,500.80
  4. Step 4: Simplify right side
    268,985.60x = 36,922,110,013.44
  5. Step 5: Solve for x
    x = 36,922,110,013.44/268,985.60
  6. Step 6: Final answer
    x = 137,264.26

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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.