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Finding the Fourth Proportional to 66,570.48, 91,868 and 36,356.70

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Solution

The fourth proportional to 66,570.48, 91,868 and 36,356.70 is: 50,172.65

Step by Step Solution

  1. Step 1: Write the proportion equation
    66,570.48 : 91,868 = 36,356.70 : x
  2. Step 2: Convert to fraction form
    66,570.48/91,868 = 36,356.70/x
  3. Step 3: Cross multiply
    66,570.48x = 91,868 × 36,356.70
  4. Step 4: Simplify right side
    66,570.48x = 3,340,017,315.60
  5. Step 5: Solve for x
    x = 3,340,017,315.60/66,570.48
  6. Step 6: Final answer
    x = 50,172.65

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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.