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Finding the Fourth Proportional to 65,709.80, 90,688.92 and 37,418.12

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Solution

The fourth proportional to 65,709.80, 90,688.92 and 37,418.12 is: 51,642.36

Step by Step Solution

  1. Step 1: Write the proportion equation
    65,709.80 : 90,688.92 = 37,418.12 : x
  2. Step 2: Convert to fraction form
    65,709.80/90,688.92 = 37,418.12/x
  3. Step 3: Cross multiply
    65,709.80x = 90,688.92 × 37,418.12
  4. Step 4: Simplify right side
    65,709.80x = 3,393,408,891.23
  5. Step 5: Solve for x
    x = 3,393,408,891.23/65,709.80
  6. Step 6: Final answer
    x = 51,642.36

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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.