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Finding the Fourth Proportional to 74,755.65, 103,178.40 and 72,385.59

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Solution

The fourth proportional to 74,755.65, 103,178.40 and 72,385.59 is: 99,907.22

Step by Step Solution

  1. Step 1: Write the proportion equation
    74,755.65 : 103,178.40 = 72,385.59 : x
  2. Step 2: Convert to fraction form
    74,755.65/103,178.40 = 72,385.59/x
  3. Step 3: Cross multiply
    74,755.65x = 103,178.40 × 72,385.59
  4. Step 4: Simplify right side
    74,755.65x = 7,468,629,359.26
  5. Step 5: Solve for x
    x = 7,468,629,359.26/74,755.65
  6. Step 6: Final answer
    x = 99,907.22

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1.5x scale

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.