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Finding the Fourth Proportional to 72,493.72, 100,036.18 and 40,230.06

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Solution

The fourth proportional to 72,493.72, 100,036.18 and 40,230.06 is: 55,514.62

Step by Step Solution

  1. Step 1: Write the proportion equation
    72,493.72 : 100,036.18 = 40,230.06 : x
  2. Step 2: Convert to fraction form
    72,493.72/100,036.18 = 40,230.06/x
  3. Step 3: Cross multiply
    72,493.72x = 100,036.18 × 40,230.06
  4. Step 4: Simplify right side
    72,493.72x = 4,024,461,523.57
  5. Step 5: Solve for x
    x = 4,024,461,523.57/72,493.72
  6. Step 6: Final answer
    x = 55,514.62

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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.