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Finding the Fourth Proportional to 133,220.36, 183,838.28 and 72,788.16

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Solution

The fourth proportional to 133,220.36, 183,838.28 and 72,788.16 is: 100,444.48

Step by Step Solution

  1. Step 1: Write the proportion equation
    133,220.36 : 183,838.28 = 72,788.16 : x
  2. Step 2: Convert to fraction form
    133,220.36/183,838.28 = 72,788.16/x
  3. Step 3: Cross multiply
    133,220.36x = 183,838.28 × 72,788.16
  4. Step 4: Simplify right side
    133,220.36x = 13,381,250,138.76
  5. Step 5: Solve for x
    x = 13,381,250,138.76/133,220.36
  6. Step 6: Final answer
    x = 100,444.48

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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.