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Finding the Fourth Proportional to 66,820.90, 100,125.60 and 54,280.12

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Solution

The fourth proportional to 66,820.90, 100,125.60 and 54,280.12 is: 81,334.28

Step by Step Solution

  1. Step 1: Write the proportion equation
    66,820.90 : 100,125.60 = 54,280.12 : x
  2. Step 2: Convert to fraction form
    66,820.90/100,125.60 = 54,280.12/x
  3. Step 3: Cross multiply
    66,820.90x = 100,125.60 × 54,280.12
  4. Step 4: Simplify right side
    66,820.90x = 5,434,829,583.07
  5. Step 5: Solve for x
    x = 5,434,829,583.07/66,820.90
  6. Step 6: Final answer
    x = 81,334.28

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.