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Finding the Fourth Proportional to 91,689.86, 137,533.67 and 25,129.93

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Solution

The fourth proportional to 91,689.86, 137,533.67 and 25,129.93 is: 37,694.59

Step by Step Solution

  1. Step 1: Write the proportion equation
    91,689.86 : 137,533.67 = 25,129.93 : x
  2. Step 2: Convert to fraction form
    91,689.86/137,533.67 = 25,129.93/x
  3. Step 3: Cross multiply
    91,689.86x = 137,533.67 × 25,129.93
  4. Step 4: Simplify right side
    91,689.86x = 3,456,211,374.09
  5. Step 5: Solve for x
    x = 3,456,211,374.09/91,689.86
  6. Step 6: Final answer
    x = 37,694.59

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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.