Home / 66,120.20-91,281.46-50,979.64

Finding the Fourth Proportional to 66,120.20, 91,281.46 and 50,979.64

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Solution

The fourth proportional to 66,120.20, 91,281.46 and 50,979.64 is: 70,379.34

Step by Step Solution

  1. Step 1: Write the proportion equation
    66,120.20 : 91,281.46 = 50,979.64 : x
  2. Step 2: Convert to fraction form
    66,120.20/91,281.46 = 50,979.64/x
  3. Step 3: Cross multiply
    66,120.20x = 91,281.46 × 50,979.64
  4. Step 4: Simplify right side
    66,120.20x = 4,653,495,969.47
  5. Step 5: Solve for x
    x = 4,653,495,969.47/66,120.20
  6. Step 6: Final answer
    x = 70,379.34

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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.