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Finding the Fourth Proportional to 70,949.76, 97,879.68 and 42,639.12

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Solution

The fourth proportional to 70,949.76, 97,879.68 and 42,639.12 is: 58,823.36

Step by Step Solution

  1. Step 1: Write the proportion equation
    70,949.76 : 97,879.68 = 42,639.12 : x
  2. Step 2: Convert to fraction form
    70,949.76/97,879.68 = 42,639.12/x
  3. Step 3: Cross multiply
    70,949.76x = 97,879.68 × 42,639.12
  4. Step 4: Simplify right side
    70,949.76x = 4,173,503,421.08
  5. Step 5: Solve for x
    x = 4,173,503,421.08/70,949.76
  6. Step 6: Final answer
    x = 58,823.36

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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.