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Finding the Fourth Proportional to 65,064.78, 89,789.40 and 35,256.78

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Solution

The fourth proportional to 65,064.78, 89,789.40 and 35,256.78 is: 48,654.36

Step by Step Solution

  1. Step 1: Write the proportion equation
    65,064.78 : 89,789.40 = 35,256.78 : x
  2. Step 2: Convert to fraction form
    65,064.78/89,789.40 = 35,256.78/x
  3. Step 3: Cross multiply
    65,064.78x = 89,789.40 × 35,256.78
  4. Step 4: Simplify right side
    65,064.78x = 3,165,685,122.13
  5. Step 5: Solve for x
    x = 3,165,685,122.13/65,064.78
  6. Step 6: Final answer
    x = 48,654.36

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.