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Finding the Fourth Proportional to 53,856.80, 80,785.20 and 42,703.10

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Solution

The fourth proportional to 53,856.80, 80,785.20 and 42,703.10 is: 64,054.65

Step by Step Solution

  1. Step 1: Write the proportion equation
    53,856.80 : 80,785.20 = 42,703.10 : x
  2. Step 2: Convert to fraction form
    53,856.80/80,785.20 = 42,703.10/x
  3. Step 3: Cross multiply
    53,856.80x = 80,785.20 × 42,703.10
  4. Step 4: Simplify right side
    53,856.80x = 3,449,778,474.12
  5. Step 5: Solve for x
    x = 3,449,778,474.12/53,856.80
  6. Step 6: Final answer
    x = 64,054.65

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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.