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Finding the Fourth Proportional to 65,765.61, 98,637.62 and 28,315.60

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Solution

The fourth proportional to 65,765.61, 98,637.62 and 28,315.60 is: 42,468.75

Step by Step Solution

  1. Step 1: Write the proportion equation
    65,765.61 : 98,637.62 = 28,315.60 : x
  2. Step 2: Convert to fraction form
    65,765.61/98,637.62 = 28,315.60/x
  3. Step 3: Cross multiply
    65,765.61x = 98,637.62 × 28,315.60
  4. Step 4: Simplify right side
    65,765.61x = 2,792,983,004.70
  5. Step 5: Solve for x
    x = 2,792,983,004.70/65,765.61
  6. Step 6: Final answer
    x = 42,468.75

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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.