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Finding the Fourth Proportional to 67,973.76, 93,809.60 and 39,688.48

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Solution

The fourth proportional to 67,973.76, 93,809.60 and 39,688.48 is: 54,773.50

Step by Step Solution

  1. Step 1: Write the proportion equation
    67,973.76 : 93,809.60 = 39,688.48 : x
  2. Step 2: Convert to fraction form
    67,973.76/93,809.60 = 39,688.48/x
  3. Step 3: Cross multiply
    67,973.76x = 93,809.60 × 39,688.48
  4. Step 4: Simplify right side
    67,973.76x = 3,723,160,433.41
  5. Step 5: Solve for x
    x = 3,723,160,433.41/67,973.76
  6. Step 6: Final answer
    x = 54,773.50

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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.