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Finding the Fourth Proportional to 133,215.36, 183,831.42 and 72,783.18

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Solution

The fourth proportional to 133,215.36, 183,831.42 and 72,783.18 is: 100,437.63

Step by Step Solution

  1. Step 1: Write the proportion equation
    133,215.36 : 183,831.42 = 72,783.18 : x
  2. Step 2: Convert to fraction form
    133,215.36/183,831.42 = 72,783.18/x
  3. Step 3: Cross multiply
    133,215.36x = 183,831.42 × 72,783.18
  4. Step 4: Simplify right side
    133,215.36x = 13,379,835,331.52
  5. Step 5: Solve for x
    x = 13,379,835,331.52/133,215.36
  6. Step 6: Final answer
    x = 100,437.63

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These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.