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Finding the Fourth Proportional to 71,263.94, 98,342.85 and 39,432.86

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Solution

The fourth proportional to 71,263.94, 98,342.85 and 39,432.86 is: 54,416.58

Step by Step Solution

  1. Step 1: Write the proportion equation
    71,263.94 : 98,342.85 = 39,432.86 : x
  2. Step 2: Convert to fraction form
    71,263.94/98,342.85 = 39,432.86/x
  3. Step 3: Cross multiply
    71,263.94x = 98,342.85 × 39,432.86
  4. Step 4: Simplify right side
    71,263.94x = 3,877,939,836.05
  5. Step 5: Solve for x
    x = 3,877,939,836.05/71,263.94
  6. Step 6: Final answer
    x = 54,416.58

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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.