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Finding the Fourth Proportional to 65,800.52, 90,783.42 and 40,280.30

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Solution

The fourth proportional to 65,800.52, 90,783.42 and 40,280.30 is: 55,573.78

Step by Step Solution

  1. Step 1: Write the proportion equation
    65,800.52 : 90,783.42 = 40,280.30 : x
  2. Step 2: Convert to fraction form
    65,800.52/90,783.42 = 40,280.30/x
  3. Step 3: Cross multiply
    65,800.52x = 90,783.42 × 40,280.30
  4. Step 4: Simplify right side
    65,800.52x = 3,656,783,392.63
  5. Step 5: Solve for x
    x = 3,656,783,392.63/65,800.52
  6. Step 6: Final answer
    x = 55,573.78

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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.