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Finding the Fourth Proportional to 93,221.05, 128,640.90 and 54,462.47

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Solution

The fourth proportional to 93,221.05, 128,640.90 and 54,462.47 is: 75,155.79

Step by Step Solution

  1. Step 1: Write the proportion equation
    93,221.05 : 128,640.90 = 54,462.47 : x
  2. Step 2: Convert to fraction form
    93,221.05/128,640.90 = 54,462.47/x
  3. Step 3: Cross multiply
    93,221.05x = 128,640.90 × 54,462.47
  4. Step 4: Simplify right side
    93,221.05x = 7,006,101,633.78
  5. Step 5: Solve for x
    x = 7,006,101,633.78/93,221.05
  6. Step 6: Final answer
    x = 75,155.79

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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.