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Finding the Fourth Proportional to 93,169.12, 128,552.32 and 78,122.56

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Solution

The fourth proportional to 93,169.12, 128,552.32 and 78,122.56 is: 107,791.47

Step by Step Solution

  1. Step 1: Write the proportion equation
    93,169.12 : 128,552.32 = 78,122.56 : x
  2. Step 2: Convert to fraction form
    93,169.12/128,552.32 = 78,122.56/x
  3. Step 3: Cross multiply
    93,169.12x = 128,552.32 × 78,122.56
  4. Step 4: Simplify right side
    93,169.12x = 10,042,836,332.34
  5. Step 5: Solve for x
    x = 10,042,836,332.34/93,169.12
  6. Step 6: Final answer
    x = 107,791.47

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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.