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Finding the Fourth Proportional to 123,343.71, 170,185.44 and 72,353.81

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Solution

The fourth proportional to 123,343.71, 170,185.44 and 72,353.81 is: 99,831.31

Step by Step Solution

  1. Step 1: Write the proportion equation
    123,343.71 : 170,185.44 = 72,353.81 : x
  2. Step 2: Convert to fraction form
    123,343.71/170,185.44 = 72,353.81/x
  3. Step 3: Cross multiply
    123,343.71x = 170,185.44 × 72,353.81
  4. Step 4: Simplify right side
    123,343.71x = 12,313,564,323.03
  5. Step 5: Solve for x
    x = 12,313,564,323.03/123,343.71
  6. Step 6: Final answer
    x = 99,831.31

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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.