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Finding the Fourth Proportional to 64,281.96, 88,698.54 and 40,391.70

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Solution

The fourth proportional to 64,281.96, 88,698.54 and 40,391.70 is: 55,733.91

Step by Step Solution

  1. Step 1: Write the proportion equation
    64,281.96 : 88,698.54 = 40,391.70 : x
  2. Step 2: Convert to fraction form
    64,281.96/88,698.54 = 40,391.70/x
  3. Step 3: Cross multiply
    64,281.96x = 88,698.54 × 40,391.70
  4. Step 4: Simplify right side
    64,281.96x = 3,582,684,818.12
  5. Step 5: Solve for x
    x = 3,582,684,818.12/64,281.96
  6. Step 6: Final answer
    x = 55,733.91

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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.