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Finding the Fourth Proportional to 112,463.84, 155,138.67 and 72,132.72

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Solution

The fourth proportional to 112,463.84, 155,138.67 and 72,132.72 is: 99,503.76

Step by Step Solution

  1. Step 1: Write the proportion equation
    112,463.84 : 155,138.67 = 72,132.72 : x
  2. Step 2: Convert to fraction form
    112,463.84/155,138.67 = 72,132.72/x
  3. Step 3: Cross multiply
    112,463.84x = 155,138.67 × 72,132.72
  4. Step 4: Simplify right side
    112,463.84x = 11,190,574,244.28
  5. Step 5: Solve for x
    x = 11,190,574,244.28/112,463.84
  6. Step 6: Final answer
    x = 99,503.76

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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.