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Finding the Fourth Proportional to 107,915.60, 148,584.64 and 91,751.12

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Solution

The fourth proportional to 107,915.60, 148,584.64 and 91,751.12 is: 126,328.42

Step by Step Solution

  1. Step 1: Write the proportion equation
    107,915.60 : 148,584.64 = 91,751.12 : x
  2. Step 2: Convert to fraction form
    107,915.60/148,584.64 = 91,751.12/x
  3. Step 3: Cross multiply
    107,915.60x = 148,584.64 × 91,751.12
  4. Step 4: Simplify right side
    107,915.60x = 13,632,807,134.80
  5. Step 5: Solve for x
    x = 13,632,807,134.80/107,915.60
  6. Step 6: Final answer
    x = 126,328.42

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.