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Finding the Fourth Proportional to 66,636.68, 91,913.54 and 42,792.30

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Solution

The fourth proportional to 66,636.68, 91,913.54 and 42,792.30 is: 59,024.43

Step by Step Solution

  1. Step 1: Write the proportion equation
    66,636.68 : 91,913.54 = 42,792.30 : x
  2. Step 2: Convert to fraction form
    66,636.68/91,913.54 = 42,792.30/x
  3. Step 3: Cross multiply
    66,636.68x = 91,913.54 × 42,792.30
  4. Step 4: Simplify right side
    66,636.68x = 3,933,191,563.78
  5. Step 5: Solve for x
    x = 3,933,191,563.78/66,636.68
  6. Step 6: Final answer
    x = 59,024.43

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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.