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Finding the Fourth Proportional to 66,711.87, 91,572.12 and 58,989.06

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Solution

The fourth proportional to 66,711.87, 91,572.12 and 58,989.06 is: 80,971.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    66,711.87 : 91,572.12 = 58,989.06 : x
  2. Step 2: Convert to fraction form
    66,711.87/91,572.12 = 58,989.06/x
  3. Step 3: Cross multiply
    66,711.87x = 91,572.12 × 58,989.06
  4. Step 4: Simplify right side
    66,711.87x = 5,401,753,281.01
  5. Step 5: Solve for x
    x = 5,401,753,281.01/66,711.87
  6. Step 6: Final answer
    x = 80,971.40

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.37) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.