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Finding the Fourth Proportional to 91,874.70, 137,812.05 and 80,210.70

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Solution

The fourth proportional to 91,874.70, 137,812.05 and 80,210.70 is: 120,316.05

Step by Step Solution

  1. Step 1: Write the proportion equation
    91,874.70 : 137,812.05 = 80,210.70 : x
  2. Step 2: Convert to fraction form
    91,874.70/137,812.05 = 80,210.70/x
  3. Step 3: Cross multiply
    91,874.70x = 137,812.05 × 80,210.70
  4. Step 4: Simplify right side
    91,874.70x = 11,054,000,998.94
  5. Step 5: Solve for x
    x = 11,054,000,998.94/91,874.70
  6. Step 6: Final answer
    x = 120,316.05

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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.