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Finding the Fourth Proportional to 65,485.48, 98,228.92 and 52,420.90

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Solution

The fourth proportional to 65,485.48, 98,228.92 and 52,420.90 is: 78,631.91

Step by Step Solution

  1. Step 1: Write the proportion equation
    65,485.48 : 98,228.92 = 52,420.90 : x
  2. Step 2: Convert to fraction form
    65,485.48/98,228.92 = 52,420.90/x
  3. Step 3: Cross multiply
    65,485.48x = 98,228.92 × 52,420.90
  4. Step 4: Simplify right side
    65,485.48x = 5,149,248,392.43
  5. Step 5: Solve for x
    x = 5,149,248,392.43/65,485.48
  6. Step 6: Final answer
    x = 78,631.91

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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.