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Finding the Fourth Proportional to 74,490.82, 102,798.45 and 40,499.24

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Solution

The fourth proportional to 74,490.82, 102,798.45 and 40,499.24 is: 55,889.55

Step by Step Solution

  1. Step 1: Write the proportion equation
    74,490.82 : 102,798.45 = 40,499.24 : x
  2. Step 2: Convert to fraction form
    74,490.82/102,798.45 = 40,499.24/x
  3. Step 3: Cross multiply
    74,490.82x = 102,798.45 × 40,499.24
  4. Step 4: Simplify right side
    74,490.82x = 4,163,258,584.19
  5. Step 5: Solve for x
    x = 4,163,258,584.19/74,490.82
  6. Step 6: Final answer
    x = 55,889.55

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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.