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Finding the Fourth Proportional to 65,439.88, 90,311.70 and 37,147.39

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Solution

The fourth proportional to 65,439.88, 90,311.70 and 37,147.39 is: 51,266.05

Step by Step Solution

  1. Step 1: Write the proportion equation
    65,439.88 : 90,311.70 = 37,147.39 : x
  2. Step 2: Convert to fraction form
    65,439.88/90,311.70 = 37,147.39/x
  3. Step 3: Cross multiply
    65,439.88x = 90,311.70 × 37,147.39
  4. Step 4: Simplify right side
    65,439.88x = 3,354,843,941.46
  5. Step 5: Solve for x
    x = 3,354,843,941.46/65,439.88
  6. Step 6: Final answer
    x = 51,266.05

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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.