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Finding the Fourth Proportional to 74,039, 102,175.30 and 40,505.72

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Solution

The fourth proportional to 74,039, 102,175.30 and 40,505.72 is: 55,898.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    74,039 : 102,175.30 = 40,505.72 : x
  2. Step 2: Convert to fraction form
    74,039/102,175.30 = 40,505.72/x
  3. Step 3: Cross multiply
    74,039x = 102,175.30 × 40,505.72
  4. Step 4: Simplify right side
    74,039x = 4,138,684,092.72
  5. Step 5: Solve for x
    x = 4,138,684,092.72/74,039
  6. Step 6: Final answer
    x = 55,898.70

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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.