Home / 66,431.25-91,678.77-38,138.76

Finding the Fourth Proportional to 66,431.25, 91,678.77 and 38,138.76

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Solution

The fourth proportional to 66,431.25, 91,678.77 and 38,138.76 is: 52,633.58

Step by Step Solution

  1. Step 1: Write the proportion equation
    66,431.25 : 91,678.77 = 38,138.76 : x
  2. Step 2: Convert to fraction form
    66,431.25/91,678.77 = 38,138.76/x
  3. Step 3: Cross multiply
    66,431.25x = 91,678.77 × 38,138.76
  4. Step 4: Simplify right side
    66,431.25x = 3,496,514,606.13
  5. Step 5: Solve for x
    x = 3,496,514,606.13/66,431.25
  6. Step 6: Final answer
    x = 52,633.58

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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.