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Finding the Fourth Proportional to 64,871.60, 89,522.78 and 35,063.60

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Solution

The fourth proportional to 64,871.60, 89,522.78 and 35,063.60 is: 48,387.75

Step by Step Solution

  1. Step 1: Write the proportion equation
    64,871.60 : 89,522.78 = 35,063.60 : x
  2. Step 2: Convert to fraction form
    64,871.60/89,522.78 = 35,063.60/x
  3. Step 3: Cross multiply
    64,871.60x = 89,522.78 × 35,063.60
  4. Step 4: Simplify right side
    64,871.60x = 3,138,990,948.81
  5. Step 5: Solve for x
    x = 3,138,990,948.81/64,871.60
  6. Step 6: Final answer
    x = 48,387.75

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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.