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Finding the Fourth Proportional to 90,203.78, 124,583.58 and 61,474.28

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Solution

The fourth proportional to 90,203.78, 124,583.58 and 61,474.28 is: 84,904.26

Step by Step Solution

  1. Step 1: Write the proportion equation
    90,203.78 : 124,583.58 = 61,474.28 : x
  2. Step 2: Convert to fraction form
    90,203.78/124,583.58 = 61,474.28/x
  3. Step 3: Cross multiply
    90,203.78x = 124,583.58 × 61,474.28
  4. Step 4: Simplify right side
    90,203.78x = 7,658,685,257.40
  5. Step 5: Solve for x
    x = 7,658,685,257.40/90,203.78
  6. Step 6: Final answer
    x = 84,904.26

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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.