Home / 66,110.78-91,223.69-38,888.10

Finding the Fourth Proportional to 66,110.78, 91,223.69 and 38,888.10

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Solution

The fourth proportional to 66,110.78, 91,223.69 and 38,888.10 is: 53,660.17

Step by Step Solution

  1. Step 1: Write the proportion equation
    66,110.78 : 91,223.69 = 38,888.10 : x
  2. Step 2: Convert to fraction form
    66,110.78/91,223.69 = 38,888.10/x
  3. Step 3: Cross multiply
    66,110.78x = 91,223.69 × 38,888.10
  4. Step 4: Simplify right side
    66,110.78x = 3,547,515,979.09
  5. Step 5: Solve for x
    x = 3,547,515,979.09/66,110.78
  6. Step 6: Final answer
    x = 53,660.17

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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.