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Finding the Fourth Proportional to 66,440.44, 91,635.90 and 42,569.44

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Solution

The fourth proportional to 66,440.44, 91,635.90 and 42,569.44 is: 58,712.57

Step by Step Solution

  1. Step 1: Write the proportion equation
    66,440.44 : 91,635.90 = 42,569.44 : x
  2. Step 2: Convert to fraction form
    66,440.44/91,635.90 = 42,569.44/x
  3. Step 3: Cross multiply
    66,440.44x = 91,635.90 × 42,569.44
  4. Step 4: Simplify right side
    66,440.44x = 3,900,888,946.90
  5. Step 5: Solve for x
    x = 3,900,888,946.90/66,440.44
  6. Step 6: Final answer
    x = 58,712.57

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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.