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Finding the Fourth Proportional to 71,298.64, 98,390.93 and 39,466.86

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Solution

The fourth proportional to 71,298.64, 98,390.93 and 39,466.86 is: 54,463.61

Step by Step Solution

  1. Step 1: Write the proportion equation
    71,298.64 : 98,390.93 = 39,466.86 : x
  2. Step 2: Convert to fraction form
    71,298.64/98,390.93 = 39,466.86/x
  3. Step 3: Cross multiply
    71,298.64x = 98,390.93 × 39,466.86
  4. Step 4: Simplify right side
    71,298.64x = 3,883,181,059.58
  5. Step 5: Solve for x
    x = 3,883,181,059.58/71,298.64
  6. Step 6: Final answer
    x = 54,463.61

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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.