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Finding the Fourth Proportional to 93,240.16, 128,680.71 and 56,939.61

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Solution

The fourth proportional to 93,240.16, 128,680.71 and 56,939.61 is: 78,582.33

Step by Step Solution

  1. Step 1: Write the proportion equation
    93,240.16 : 128,680.71 = 56,939.61 : x
  2. Step 2: Convert to fraction form
    93,240.16/128,680.71 = 56,939.61/x
  3. Step 3: Cross multiply
    93,240.16x = 128,680.71 × 56,939.61
  4. Step 4: Simplify right side
    93,240.16x = 7,327,029,441.92
  5. Step 5: Solve for x
    x = 7,327,029,441.92/93,240.16
  6. Step 6: Final answer
    x = 78,582.33

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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.