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Finding the Fourth Proportional to 66,074.80, 99,112.20 and 60,631.60

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Solution

The fourth proportional to 66,074.80, 99,112.20 and 60,631.60 is: 90,947.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    66,074.80 : 99,112.20 = 60,631.60 : x
  2. Step 2: Convert to fraction form
    66,074.80/99,112.20 = 60,631.60/x
  3. Step 3: Cross multiply
    66,074.80x = 99,112.20 × 60,631.60
  4. Step 4: Simplify right side
    66,074.80x = 6,009,331,265.52
  5. Step 5: Solve for x
    x = 6,009,331,265.52/66,074.80
  6. Step 6: Final answer
    x = 90,947.40

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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.