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Finding the Fourth Proportional to 74,898.79, 103,359.80 and 40,907.28

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Solution

The fourth proportional to 74,898.79, 103,359.80 and 40,907.28 is: 56,451.75

Step by Step Solution

  1. Step 1: Write the proportion equation
    74,898.79 : 103,359.80 = 40,907.28 : x
  2. Step 2: Convert to fraction form
    74,898.79/103,359.80 = 40,907.28/x
  3. Step 3: Cross multiply
    74,898.79x = 103,359.80 × 40,907.28
  4. Step 4: Simplify right side
    74,898.79x = 4,228,167,558.01
  5. Step 5: Solve for x
    x = 4,228,167,558.01/74,898.79
  6. Step 6: Final answer
    x = 56,451.75

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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.