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Finding the Fourth Proportional to 65,707.81, 90,676.81 and 35,493.13

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Solution

The fourth proportional to 65,707.81, 90,676.81 and 35,493.13 is: 48,980.54

Step by Step Solution

  1. Step 1: Write the proportion equation
    65,707.81 : 90,676.81 = 35,493.13 : x
  2. Step 2: Convert to fraction form
    65,707.81/90,676.81 = 35,493.13/x
  3. Step 3: Cross multiply
    65,707.81x = 90,676.81 × 35,493.13
  4. Step 4: Simplify right side
    65,707.81x = 3,218,404,029.58
  5. Step 5: Solve for x
    x = 3,218,404,029.58/65,707.81
  6. Step 6: Final answer
    x = 48,980.54

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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.