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Finding the Fourth Proportional to 70,919.08, 97,872.71 and 39,087.90

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Solution

The fourth proportional to 70,919.08, 97,872.71 and 39,087.90 is: 53,943.72

Step by Step Solution

  1. Step 1: Write the proportion equation
    70,919.08 : 97,872.71 = 39,087.90 : x
  2. Step 2: Convert to fraction form
    70,919.08/97,872.71 = 39,087.90/x
  3. Step 3: Cross multiply
    70,919.08x = 97,872.71 × 39,087.90
  4. Step 4: Simplify right side
    70,919.08x = 3,825,638,505.77
  5. Step 5: Solve for x
    x = 3,825,638,505.77/70,919.08
  6. Step 6: Final answer
    x = 53,943.72

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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.