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Finding the Fourth Proportional to 72,770.82, 100,423.58 and 40,939.75

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Solution

The fourth proportional to 72,770.82, 100,423.58 and 40,939.75 is: 56,496.77

Step by Step Solution

  1. Step 1: Write the proportion equation
    72,770.82 : 100,423.58 = 40,939.75 : x
  2. Step 2: Convert to fraction form
    72,770.82/100,423.58 = 40,939.75/x
  3. Step 3: Cross multiply
    72,770.82x = 100,423.58 × 40,939.75
  4. Step 4: Simplify right side
    72,770.82x = 4,111,316,054.61
  5. Step 5: Solve for x
    x = 4,111,316,054.61/72,770.82
  6. Step 6: Final answer
    x = 56,496.77

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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.