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Finding the Fourth Proportional to 91,261.40, 136,867.80 and 28,081.40

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Solution

The fourth proportional to 91,261.40, 136,867.80 and 28,081.40 is: 42,114.62

Step by Step Solution

  1. Step 1: Write the proportion equation
    91,261.40 : 136,867.80 = 28,081.40 : x
  2. Step 2: Convert to fraction form
    91,261.40/136,867.80 = 28,081.40/x
  3. Step 3: Cross multiply
    91,261.40x = 136,867.80 × 28,081.40
  4. Step 4: Simplify right side
    91,261.40x = 3,843,439,438.92
  5. Step 5: Solve for x
    x = 3,843,439,438.92/91,261.40
  6. Step 6: Final answer
    x = 42,114.62

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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.