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Finding the Fourth Proportional to 61,138.40, 91,621.20 and 37,695.20

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Solution

The fourth proportional to 61,138.40, 91,621.20 and 37,695.20 is: 56,489.53

Step by Step Solution

  1. Step 1: Write the proportion equation
    61,138.40 : 91,621.20 = 37,695.20 : x
  2. Step 2: Convert to fraction form
    61,138.40/91,621.20 = 37,695.20/x
  3. Step 3: Cross multiply
    61,138.40x = 91,621.20 × 37,695.20
  4. Step 4: Simplify right side
    61,138.40x = 3,453,679,458.24
  5. Step 5: Solve for x
    x = 3,453,679,458.24/61,138.40
  6. Step 6: Final answer
    x = 56,489.53

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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.