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Finding the Fourth Proportional to 72,630.32, 100,218.93 and 40,793.12

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Solution

The fourth proportional to 72,630.32, 100,218.93 and 40,793.12 is: 56,288.38

Step by Step Solution

  1. Step 1: Write the proportion equation
    72,630.32 : 100,218.93 = 40,793.12 : x
  2. Step 2: Convert to fraction form
    72,630.32/100,218.93 = 40,793.12/x
  3. Step 3: Cross multiply
    72,630.32x = 100,218.93 × 40,793.12
  4. Step 4: Simplify right side
    72,630.32x = 4,088,242,837.76
  5. Step 5: Solve for x
    x = 4,088,242,837.76/72,630.32
  6. Step 6: Final answer
    x = 56,288.38

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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.