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Finding the Fourth Proportional to 64,138.60, 88,503.78 and 40,263.40

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Solution

The fourth proportional to 64,138.60, 88,503.78 and 40,263.40 is: 55,558.79

Step by Step Solution

  1. Step 1: Write the proportion equation
    64,138.60 : 88,503.78 = 40,263.40 : x
  2. Step 2: Convert to fraction form
    64,138.60/88,503.78 = 40,263.40/x
  3. Step 3: Cross multiply
    64,138.60x = 88,503.78 × 40,263.40
  4. Step 4: Simplify right side
    64,138.60x = 3,563,463,095.65
  5. Step 5: Solve for x
    x = 3,563,463,095.65/64,138.60
  6. Step 6: Final answer
    x = 55,558.79

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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.