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Finding the Fourth Proportional to 91,432.80, 126,188.88 and 51,148.80

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Solution

The fourth proportional to 91,432.80, 126,188.88 and 51,148.80 is: 70,591.84

Step by Step Solution

  1. Step 1: Write the proportion equation
    91,432.80 : 126,188.88 = 51,148.80 : x
  2. Step 2: Convert to fraction form
    91,432.80/126,188.88 = 51,148.80/x
  3. Step 3: Cross multiply
    91,432.80x = 126,188.88 × 51,148.80
  4. Step 4: Simplify right side
    91,432.80x = 6,454,409,785.34
  5. Step 5: Solve for x
    x = 6,454,409,785.34/91,432.80
  6. Step 6: Final answer
    x = 70,591.84

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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.