Home / 81,725.78-112,786.38-61,547.06

Finding the Fourth Proportional to 81,725.78, 112,786.38 and 61,547.06

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Solution

The fourth proportional to 81,725.78, 112,786.38 and 61,547.06 is: 84,938.56

Step by Step Solution

  1. Step 1: Write the proportion equation
    81,725.78 : 112,786.38 = 61,547.06 : x
  2. Step 2: Convert to fraction form
    81,725.78/112,786.38 = 61,547.06/x
  3. Step 3: Cross multiply
    81,725.78x = 112,786.38 × 61,547.06
  4. Step 4: Simplify right side
    81,725.78x = 6,941,670,097.04
  5. Step 5: Solve for x
    x = 6,941,670,097.04/81,725.78
  6. Step 6: Final answer
    x = 84,938.56

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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.