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Finding the Fourth Proportional to 90,202.71, 124,582.54 and 61,472.82

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Solution

The fourth proportional to 90,202.71, 124,582.54 and 61,472.82 is: 84,902.55

Step by Step Solution

  1. Step 1: Write the proportion equation
    90,202.71 : 124,582.54 = 61,472.82 : x
  2. Step 2: Convert to fraction form
    90,202.71/124,582.54 = 61,472.82/x
  3. Step 3: Cross multiply
    90,202.71x = 124,582.54 × 61,472.82
  4. Step 4: Simplify right side
    90,202.71x = 7,658,440,056.56
  5. Step 5: Solve for x
    x = 7,658,440,056.56/90,202.71
  6. Step 6: Final answer
    x = 84,902.55

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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.