Home / 81,012.78-111,779.73-47,001.55

Finding the Fourth Proportional to 81,012.78, 111,779.73 and 47,001.55

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Solution

The fourth proportional to 81,012.78, 111,779.73 and 47,001.55 is: 64,851.75

Step by Step Solution

  1. Step 1: Write the proportion equation
    81,012.78 : 111,779.73 = 47,001.55 : x
  2. Step 2: Convert to fraction form
    81,012.78/111,779.73 = 47,001.55/x
  3. Step 3: Cross multiply
    81,012.78x = 111,779.73 × 47,001.55
  4. Step 4: Simplify right side
    81,012.78x = 5,253,820,568.58
  5. Step 5: Solve for x
    x = 5,253,820,568.58/81,012.78
  6. Step 6: Final answer
    x = 64,851.75

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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.