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Finding the Fourth Proportional to 61,896.72, 92,720.19 and 28,570.50

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Solution

The fourth proportional to 61,896.72, 92,720.19 and 28,570.50 is: 42,798.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    61,896.72 : 92,720.19 = 28,570.50 : x
  2. Step 2: Convert to fraction form
    61,896.72/92,720.19 = 28,570.50/x
  3. Step 3: Cross multiply
    61,896.72x = 92,720.19 × 28,570.50
  4. Step 4: Simplify right side
    61,896.72x = 2,649,062,188.40
  5. Step 5: Solve for x
    x = 2,649,062,188.40/61,896.72
  6. Step 6: Final answer
    x = 42,798.10

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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.