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Finding the Fourth Proportional to 101,364.48, 139,878.90 and 58,919.67

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Solution

The fourth proportional to 101,364.48, 139,878.90 and 58,919.67 is: 81,306.77

Step by Step Solution

  1. Step 1: Write the proportion equation
    101,364.48 : 139,878.90 = 58,919.67 : x
  2. Step 2: Convert to fraction form
    101,364.48/139,878.90 = 58,919.67/x
  3. Step 3: Cross multiply
    101,364.48x = 139,878.90 × 58,919.67
  4. Step 4: Simplify right side
    101,364.48x = 8,241,618,627.96
  5. Step 5: Solve for x
    x = 8,241,618,627.96/101,364.48
  6. Step 6: Final answer
    x = 81,306.77

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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.