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Finding the Fourth Proportional to 65,621.40, 98,444.90 and 28,181.40

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Solution

The fourth proportional to 65,621.40, 98,444.90 and 28,181.40 is: 42,277.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    65,621.40 : 98,444.90 = 28,181.40 : x
  2. Step 2: Convert to fraction form
    65,621.40/98,444.90 = 28,181.40/x
  3. Step 3: Cross multiply
    65,621.40x = 98,444.90 × 28,181.40
  4. Step 4: Simplify right side
    65,621.40x = 2,774,315,104.86
  5. Step 5: Solve for x
    x = 2,774,315,104.86/65,621.40
  6. Step 6: Final answer
    x = 42,277.60

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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.