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Finding the Fourth Proportional to 91,122.76, 136,531.05 and 64,696.51

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Solution

The fourth proportional to 91,122.76, 136,531.05 and 64,696.51 is: 96,936.07

Step by Step Solution

  1. Step 1: Write the proportion equation
    91,122.76 : 136,531.05 = 64,696.51 : x
  2. Step 2: Convert to fraction form
    91,122.76/136,531.05 = 64,696.51/x
  3. Step 3: Cross multiply
    91,122.76x = 136,531.05 × 64,696.51
  4. Step 4: Simplify right side
    91,122.76x = 8,833,082,441.64
  5. Step 5: Solve for x
    x = 8,833,082,441.64/91,122.76
  6. Step 6: Final answer
    x = 96,936.07

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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.