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Finding the Fourth Proportional to 64,374.80, 88,880.64 and 40,212.68

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Solution

The fourth proportional to 64,374.80, 88,880.64 and 40,212.68 is: 55,520.62

Step by Step Solution

  1. Step 1: Write the proportion equation
    64,374.80 : 88,880.64 = 40,212.68 : x
  2. Step 2: Convert to fraction form
    64,374.80/88,880.64 = 40,212.68/x
  3. Step 3: Cross multiply
    64,374.80x = 88,880.64 × 40,212.68
  4. Step 4: Simplify right side
    64,374.80x = 3,574,128,734.52
  5. Step 5: Solve for x
    x = 3,574,128,734.52/64,374.80
  6. Step 6: Final answer
    x = 55,520.62

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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.