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Finding the Fourth Proportional to 91,816.70, 137,725.05 and 87,928.70

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Solution

The fourth proportional to 91,816.70, 137,725.05 and 87,928.70 is: 131,893.05

Step by Step Solution

  1. Step 1: Write the proportion equation
    91,816.70 : 137,725.05 = 87,928.70 : x
  2. Step 2: Convert to fraction form
    91,816.70/137,725.05 = 87,928.70/x
  3. Step 3: Cross multiply
    91,816.70x = 137,725.05 × 87,928.70
  4. Step 4: Simplify right side
    91,816.70x = 12,109,984,603.94
  5. Step 5: Solve for x
    x = 12,109,984,603.94/91,816.70
  6. Step 6: Final answer
    x = 131,893.05

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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.