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Finding the Fourth Proportional to 91,277.44, 136,912 and 64,661.12

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Solution

The fourth proportional to 91,277.44, 136,912 and 64,661.12 is: 96,988.73

Step by Step Solution

  1. Step 1: Write the proportion equation
    91,277.44 : 136,912 = 64,661.12 : x
  2. Step 2: Convert to fraction form
    91,277.44/136,912 = 64,661.12/x
  3. Step 3: Cross multiply
    91,277.44x = 136,912 × 64,661.12
  4. Step 4: Simplify right side
    91,277.44x = 8,852,883,261.44
  5. Step 5: Solve for x
    x = 8,852,883,261.44/91,277.44
  6. Step 6: Final answer
    x = 96,988.73

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1.5x scale

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.