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Finding the Fourth Proportional to 64,878.60, 97,304.06 and 20,508.84

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Solution

The fourth proportional to 64,878.60, 97,304.06 and 20,508.84 is: 30,758.89

Step by Step Solution

  1. Step 1: Write the proportion equation
    64,878.60 : 97,304.06 = 20,508.84 : x
  2. Step 2: Convert to fraction form
    64,878.60/97,304.06 = 20,508.84/x
  3. Step 3: Cross multiply
    64,878.60x = 97,304.06 × 20,508.84
  4. Step 4: Simplify right side
    64,878.60x = 1,995,593,397.89
  5. Step 5: Solve for x
    x = 1,995,593,397.89/64,878.60
  6. Step 6: Final answer
    x = 30,758.89

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.