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Finding the Fourth Proportional to 74,690.60, 103,071.69 and 40,699.38

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Solution

The fourth proportional to 74,690.60, 103,071.69 and 40,699.38 is: 56,164.42

Step by Step Solution

  1. Step 1: Write the proportion equation
    74,690.60 : 103,071.69 = 40,699.38 : x
  2. Step 2: Convert to fraction form
    74,690.60/103,071.69 = 40,699.38/x
  3. Step 3: Cross multiply
    74,690.60x = 103,071.69 × 40,699.38
  4. Step 4: Simplify right side
    74,690.60x = 4,194,953,878.55
  5. Step 5: Solve for x
    x = 4,194,953,878.55/74,690.60
  6. Step 6: Final answer
    x = 56,164.42

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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.