Home / 57,121.20-85,681.80-17,690.40

Finding the Fourth Proportional to 57,121.20, 85,681.80 and 17,690.40

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Solution

The fourth proportional to 57,121.20, 85,681.80 and 17,690.40 is: 26,535.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    57,121.20 : 85,681.80 = 17,690.40 : x
  2. Step 2: Convert to fraction form
    57,121.20/85,681.80 = 17,690.40/x
  3. Step 3: Cross multiply
    57,121.20x = 85,681.80 × 17,690.40
  4. Step 4: Simplify right side
    57,121.20x = 1,515,745,314.72
  5. Step 5: Solve for x
    x = 1,515,745,314.72/57,121.20
  6. Step 6: Final answer
    x = 26,535.60

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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.