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Finding the Fourth Proportional to 91,535.16, 136,599.99 and 91,009.56

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Solution

The fourth proportional to 91,535.16, 136,599.99 and 91,009.56 is: 135,815.63

Step by Step Solution

  1. Step 1: Write the proportion equation
    91,535.16 : 136,599.99 = 91,009.56 : x
  2. Step 2: Convert to fraction form
    91,535.16/136,599.99 = 91,009.56/x
  3. Step 3: Cross multiply
    91,535.16x = 136,599.99 × 91,009.56
  4. Step 4: Simplify right side
    91,535.16x = 12,431,904,985.90
  5. Step 5: Solve for x
    x = 12,431,904,985.90/91,535.16
  6. Step 6: Final answer
    x = 135,815.63

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Why These Related Problems?

These problems maintain the same ratio (1.49) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.