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Finding the Fourth Proportional to 93,138.87, 128,512.19 and 60,920.72

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Solution

The fourth proportional to 93,138.87, 128,512.19 and 60,920.72 is: 84,057.86

Step by Step Solution

  1. Step 1: Write the proportion equation
    93,138.87 : 128,512.19 = 60,920.72 : x
  2. Step 2: Convert to fraction form
    93,138.87/128,512.19 = 60,920.72/x
  3. Step 3: Cross multiply
    93,138.87x = 128,512.19 × 60,920.72
  4. Step 4: Simplify right side
    93,138.87x = 7,829,054,196.41
  5. Step 5: Solve for x
    x = 7,829,054,196.41/93,138.87
  6. Step 6: Final answer
    x = 84,057.86

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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.