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Finding the Fourth Proportional to 70,901.72, 97,845.03 and 39,071.76

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Solution

The fourth proportional to 70,901.72, 97,845.03 and 39,071.76 is: 53,919.39

Step by Step Solution

  1. Step 1: Write the proportion equation
    70,901.72 : 97,845.03 = 39,071.76 : x
  2. Step 2: Convert to fraction form
    70,901.72/97,845.03 = 39,071.76/x
  3. Step 3: Cross multiply
    70,901.72x = 97,845.03 × 39,071.76
  4. Step 4: Simplify right side
    70,901.72x = 3,822,977,529.35
  5. Step 5: Solve for x
    x = 3,822,977,529.35/70,901.72
  6. Step 6: Final answer
    x = 53,919.39

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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.