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Finding the Fourth Proportional to 61,815.72, 92,740.86 and 20,291.88

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Solution

The fourth proportional to 61,815.72, 92,740.86 and 20,291.88 is: 30,443.49

Step by Step Solution

  1. Step 1: Write the proportion equation
    61,815.72 : 92,740.86 = 20,291.88 : x
  2. Step 2: Convert to fraction form
    61,815.72/92,740.86 = 20,291.88/x
  3. Step 3: Cross multiply
    61,815.72x = 92,740.86 × 20,291.88
  4. Step 4: Simplify right side
    61,815.72x = 1,881,886,402.22
  5. Step 5: Solve for x
    x = 1,881,886,402.22/61,815.72
  6. Step 6: Final answer
    x = 30,443.49

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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.