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Finding the Fourth Proportional to 93,121.90, 128,508.79 and 50,680.87

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Solution

The fourth proportional to 93,121.90, 128,508.79 and 50,680.87 is: 69,939.91

Step by Step Solution

  1. Step 1: Write the proportion equation
    93,121.90 : 128,508.79 = 50,680.87 : x
  2. Step 2: Convert to fraction form
    93,121.90/128,508.79 = 50,680.87/x
  3. Step 3: Cross multiply
    93,121.90x = 128,508.79 × 50,680.87
  4. Step 4: Simplify right side
    93,121.90x = 6,512,937,279.85
  5. Step 5: Solve for x
    x = 6,512,937,279.85/93,121.90
  6. Step 6: Final answer
    x = 69,939.91

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1.5x scale

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.