Home / 91,205.15-125,865.23-57,215.07

Finding the Fourth Proportional to 91,205.15, 125,865.23 and 57,215.07

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Solution

The fourth proportional to 91,205.15, 125,865.23 and 57,215.07 is: 78,958.13

Step by Step Solution

  1. Step 1: Write the proportion equation
    91,205.15 : 125,865.23 = 57,215.07 : x
  2. Step 2: Convert to fraction form
    91,205.15/125,865.23 = 57,215.07/x
  3. Step 3: Cross multiply
    91,205.15x = 125,865.23 × 57,215.07
  4. Step 4: Simplify right side
    91,205.15x = 7,201,387,945.02
  5. Step 5: Solve for x
    x = 7,201,387,945.02/91,205.15
  6. Step 6: Final answer
    x = 78,958.13

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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.