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Finding the Fourth Proportional to 91,278.86, 136,933.86 and 40,696.24

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Solution

The fourth proportional to 91,278.86, 136,933.86 and 40,696.24 is: 61,051.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    91,278.86 : 136,933.86 = 40,696.24 : x
  2. Step 2: Convert to fraction form
    91,278.86/136,933.86 = 40,696.24/x
  3. Step 3: Cross multiply
    91,278.86x = 136,933.86 × 40,696.24
  4. Step 4: Simplify right side
    91,278.86x = 5,572,692,684.87
  5. Step 5: Solve for x
    x = 5,572,692,684.87/91,278.86
  6. Step 6: Final answer
    x = 61,051.30

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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.