Home / 72,065.20-99,445.80-40,236.10

Finding the Fourth Proportional to 72,065.20, 99,445.80 and 40,236.10

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Solution

The fourth proportional to 72,065.20, 99,445.80 and 40,236.10 is: 55,523.49

Step by Step Solution

  1. Step 1: Write the proportion equation
    72,065.20 : 99,445.80 = 40,236.10 : x
  2. Step 2: Convert to fraction form
    72,065.20/99,445.80 = 40,236.10/x
  3. Step 3: Cross multiply
    72,065.20x = 99,445.80 × 40,236.10
  4. Step 4: Simplify right side
    72,065.20x = 4,001,311,153.38
  5. Step 5: Solve for x
    x = 4,001,311,153.38/72,065.20
  6. Step 6: Final answer
    x = 55,523.49

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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.