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Finding the Fourth Proportional to 64,930.86, 97,386.55 and 20,551.86

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Solution

The fourth proportional to 64,930.86, 97,386.55 and 20,551.86 is: 30,824.71

Step by Step Solution

  1. Step 1: Write the proportion equation
    64,930.86 : 97,386.55 = 20,551.86 : x
  2. Step 2: Convert to fraction form
    64,930.86/97,386.55 = 20,551.86/x
  3. Step 3: Cross multiply
    64,930.86x = 97,386.55 × 20,551.86
  4. Step 4: Simplify right side
    64,930.86x = 2,001,474,690.10
  5. Step 5: Solve for x
    x = 2,001,474,690.10/64,930.86
  6. Step 6: Final answer
    x = 30,824.71

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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.