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Finding the Fourth Proportional to 65,583.78, 90,430.74 and 53,908.44

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Solution

The fourth proportional to 65,583.78, 90,430.74 and 53,908.44 is: 74,332.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    65,583.78 : 90,430.74 = 53,908.44 : x
  2. Step 2: Convert to fraction form
    65,583.78/90,430.74 = 53,908.44/x
  3. Step 3: Cross multiply
    65,583.78x = 90,430.74 × 53,908.44
  4. Step 4: Simplify right side
    65,583.78x = 4,874,980,121.45
  5. Step 5: Solve for x
    x = 4,874,980,121.45/65,583.78
  6. Step 6: Final answer
    x = 74,332.10

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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.