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Finding the Fourth Proportional to 61,779.78, 92,614.86 and 30,172.50

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Solution

The fourth proportional to 61,779.78, 92,614.86 and 30,172.50 is: 45,231.98

Step by Step Solution

  1. Step 1: Write the proportion equation
    61,779.78 : 92,614.86 = 30,172.50 : x
  2. Step 2: Convert to fraction form
    61,779.78/92,614.86 = 30,172.50/x
  3. Step 3: Cross multiply
    61,779.78x = 92,614.86 × 30,172.50
  4. Step 4: Simplify right side
    61,779.78x = 2,794,421,863.35
  5. Step 5: Solve for x
    x = 2,794,421,863.35/61,779.78
  6. Step 6: Final answer
    x = 45,231.98

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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.