Home / 66,109.78-91,222.31-38,887.10

Finding the Fourth Proportional to 66,109.78, 91,222.31 and 38,887.10

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Solution

The fourth proportional to 66,109.78, 91,222.31 and 38,887.10 is: 53,658.79

Step by Step Solution

  1. Step 1: Write the proportion equation
    66,109.78 : 91,222.31 = 38,887.10 : x
  2. Step 2: Convert to fraction form
    66,109.78/91,222.31 = 38,887.10/x
  3. Step 3: Cross multiply
    66,109.78x = 91,222.31 × 38,887.10
  4. Step 4: Simplify right side
    66,109.78x = 3,547,370,732.31
  5. Step 5: Solve for x
    x = 3,547,370,732.31/66,109.78
  6. Step 6: Final answer
    x = 53,658.79

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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.