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Finding the Fourth Proportional to 74,774.68, 103,130.69 and 47,919.67

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Solution

The fourth proportional to 74,774.68, 103,130.69 and 47,919.67 is: 66,091.73

Step by Step Solution

  1. Step 1: Write the proportion equation
    74,774.68 : 103,130.69 = 47,919.67 : x
  2. Step 2: Convert to fraction form
    74,774.68/103,130.69 = 47,919.67/x
  3. Step 3: Cross multiply
    74,774.68x = 103,130.69 × 47,919.67
  4. Step 4: Simplify right side
    74,774.68x = 4,941,988,134.25
  5. Step 5: Solve for x
    x = 4,941,988,134.25/74,774.68
  6. Step 6: Final answer
    x = 66,091.73

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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.