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Finding the Fourth Proportional to 65,697.78, 98,547.21 and 28,255.26

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Solution

The fourth proportional to 65,697.78, 98,547.21 and 28,255.26 is: 42,383.12

Step by Step Solution

  1. Step 1: Write the proportion equation
    65,697.78 : 98,547.21 = 28,255.26 : x
  2. Step 2: Convert to fraction form
    65,697.78/98,547.21 = 28,255.26/x
  3. Step 3: Cross multiply
    65,697.78x = 98,547.21 × 28,255.26
  4. Step 4: Simplify right side
    65,697.78x = 2,784,477,040.82
  5. Step 5: Solve for x
    x = 2,784,477,040.82/65,697.78
  6. Step 6: Final answer
    x = 42,383.12

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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.