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Finding the Fourth Proportional to 72,464.19, 100,000.49 and 40,203.70

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Solution

The fourth proportional to 72,464.19, 100,000.49 and 40,203.70 is: 55,481.05

Step by Step Solution

  1. Step 1: Write the proportion equation
    72,464.19 : 100,000.49 = 40,203.70 : x
  2. Step 2: Convert to fraction form
    72,464.19/100,000.49 = 40,203.70/x
  3. Step 3: Cross multiply
    72,464.19x = 100,000.49 × 40,203.70
  4. Step 4: Simplify right side
    72,464.19x = 4,020,389,699.81
  5. Step 5: Solve for x
    x = 4,020,389,699.81/72,464.19
  6. Step 6: Final answer
    x = 55,481.05

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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.