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Finding the Fourth Proportional to 74,690.93, 103,072.16 and 40,699.67

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Solution

The fourth proportional to 74,690.93, 103,072.16 and 40,699.67 is: 56,164.82

Step by Step Solution

  1. Step 1: Write the proportion equation
    74,690.93 : 103,072.16 = 40,699.67 : x
  2. Step 2: Convert to fraction form
    74,690.93/103,072.16 = 40,699.67/x
  3. Step 3: Cross multiply
    74,690.93x = 103,072.16 × 40,699.67
  4. Step 4: Simplify right side
    74,690.93x = 4,195,002,484.58
  5. Step 5: Solve for x
    x = 4,195,002,484.58/74,690.93
  6. Step 6: Final answer
    x = 56,164.82

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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.