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Finding the Fourth Proportional to 66,368.88, 91,528.92 and 43,974

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Solution

The fourth proportional to 66,368.88, 91,528.92 and 43,974 is: 60,644.28

Step by Step Solution

  1. Step 1: Write the proportion equation
    66,368.88 : 91,528.92 = 43,974 : x
  2. Step 2: Convert to fraction form
    66,368.88/91,528.92 = 43,974/x
  3. Step 3: Cross multiply
    66,368.88x = 91,528.92 × 43,974
  4. Step 4: Simplify right side
    66,368.88x = 4,024,892,728.08
  5. Step 5: Solve for x
    x = 4,024,892,728.08/66,368.88
  6. Step 6: Final answer
    x = 60,644.28

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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.