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Finding the Fourth Proportional to 65,587.86, 98,360.80 and 28,137.85

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Solution

The fourth proportional to 65,587.86, 98,360.80 and 28,137.85 is: 42,197.77

Step by Step Solution

  1. Step 1: Write the proportion equation
    65,587.86 : 98,360.80 = 28,137.85 : x
  2. Step 2: Convert to fraction form
    65,587.86/98,360.80 = 28,137.85/x
  3. Step 3: Cross multiply
    65,587.86x = 98,360.80 × 28,137.85
  4. Step 4: Simplify right side
    65,587.86x = 2,767,661,120.03
  5. Step 5: Solve for x
    x = 2,767,661,120.03/65,587.86
  6. Step 6: Final answer
    x = 42,197.77

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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.