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Finding the Fourth Proportional to 72,349.74, 99,831.03 and 40,519.98

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Solution

The fourth proportional to 72,349.74, 99,831.03 and 40,519.98 is: 55,911.07

Step by Step Solution

  1. Step 1: Write the proportion equation
    72,349.74 : 99,831.03 = 40,519.98 : x
  2. Step 2: Convert to fraction form
    72,349.74/99,831.03 = 40,519.98/x
  3. Step 3: Cross multiply
    72,349.74x = 99,831.03 × 40,519.98
  4. Step 4: Simplify right side
    72,349.74x = 4,045,151,338.98
  5. Step 5: Solve for x
    x = 4,045,151,338.98/72,349.74
  6. Step 6: Final answer
    x = 55,911.07

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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.