Home / 65,665.10-90,491.42-47,731.70

Finding the Fourth Proportional to 65,665.10, 90,491.42 and 47,731.70

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Solution

The fourth proportional to 65,665.10, 90,491.42 and 47,731.70 is: 65,777.85

Step by Step Solution

  1. Step 1: Write the proportion equation
    65,665.10 : 90,491.42 = 47,731.70 : x
  2. Step 2: Convert to fraction form
    65,665.10/90,491.42 = 47,731.70/x
  3. Step 3: Cross multiply
    65,665.10x = 90,491.42 × 47,731.70
  4. Step 4: Simplify right side
    65,665.10x = 4,319,308,620.90
  5. Step 5: Solve for x
    x = 4,319,308,620.90/65,665.10
  6. Step 6: Final answer
    x = 65,777.85

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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.