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Finding the Fourth Proportional to 74,693, 103,075 and 40,701.72

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Solution

The fourth proportional to 74,693, 103,075 and 40,701.72 is: 56,167.64

Step by Step Solution

  1. Step 1: Write the proportion equation
    74,693 : 103,075 = 40,701.72 : x
  2. Step 2: Convert to fraction form
    74,693/103,075 = 40,701.72/x
  3. Step 3: Cross multiply
    74,693x = 103,075 × 40,701.72
  4. Step 4: Simplify right side
    74,693x = 4,195,329,789
  5. Step 5: Solve for x
    x = 4,195,329,789/74,693
  6. Step 6: Final answer
    x = 56,167.64

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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.