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Finding the Fourth Proportional to 91,287.70, 136,938.77 and 32,136.64

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Solution

The fourth proportional to 91,287.70, 136,938.77 and 32,136.64 is: 48,207.50

Step by Step Solution

  1. Step 1: Write the proportion equation
    91,287.70 : 136,938.77 = 32,136.64 : x
  2. Step 2: Convert to fraction form
    91,287.70/136,938.77 = 32,136.64/x
  3. Step 3: Cross multiply
    91,287.70x = 136,938.77 × 32,136.64
  4. Step 4: Simplify right side
    91,287.70x = 4,400,751,953.53
  5. Step 5: Solve for x
    x = 4,400,751,953.53/91,287.70
  6. Step 6: Final answer
    x = 48,207.50

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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.