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Finding the Fourth Proportional to 93,219.78, 128,642.64 and 50,778.31

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Solution

The fourth proportional to 93,219.78, 128,642.64 and 50,778.31 is: 70,073.71

Step by Step Solution

  1. Step 1: Write the proportion equation
    93,219.78 : 128,642.64 = 50,778.31 : x
  2. Step 2: Convert to fraction form
    93,219.78/128,642.64 = 50,778.31/x
  3. Step 3: Cross multiply
    93,219.78x = 128,642.64 × 50,778.31
  4. Step 4: Simplify right side
    93,219.78x = 6,532,255,853.14
  5. Step 5: Solve for x
    x = 6,532,255,853.14/93,219.78
  6. Step 6: Final answer
    x = 70,073.71

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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.