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Finding the Fourth Proportional to 65,718.90, 98,541.90 and 28,272.60

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Solution

The fourth proportional to 65,718.90, 98,541.90 and 28,272.60 is: 42,393.22

Step by Step Solution

  1. Step 1: Write the proportion equation
    65,718.90 : 98,541.90 = 28,272.60 : x
  2. Step 2: Convert to fraction form
    65,718.90/98,541.90 = 28,272.60/x
  3. Step 3: Cross multiply
    65,718.90x = 98,541.90 × 28,272.60
  4. Step 4: Simplify right side
    65,718.90x = 2,786,035,721.94
  5. Step 5: Solve for x
    x = 2,786,035,721.94/65,718.90
  6. Step 6: Final answer
    x = 42,393.22

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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.