Home / 67,621.20-101,431.80-66,746.40

Finding the Fourth Proportional to 67,621.20, 101,431.80 and 66,746.40

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Solution

The fourth proportional to 67,621.20, 101,431.80 and 66,746.40 is: 100,119.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    67,621.20 : 101,431.80 = 66,746.40 : x
  2. Step 2: Convert to fraction form
    67,621.20/101,431.80 = 66,746.40/x
  3. Step 3: Cross multiply
    67,621.20x = 101,431.80 × 66,746.40
  4. Step 4: Simplify right side
    67,621.20x = 6,770,207,495.52
  5. Step 5: Solve for x
    x = 6,770,207,495.52/67,621.20
  6. Step 6: Final answer
    x = 100,119.60

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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.