Home / 91,209.15-125,870.75-57,219.07

Finding the Fourth Proportional to 91,209.15, 125,870.75 and 57,219.07

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Solution

The fourth proportional to 91,209.15, 125,870.75 and 57,219.07 is: 78,963.65

Step by Step Solution

  1. Step 1: Write the proportion equation
    91,209.15 : 125,870.75 = 57,219.07 : x
  2. Step 2: Convert to fraction form
    91,209.15/125,870.75 = 57,219.07/x
  3. Step 3: Cross multiply
    91,209.15x = 125,870.75 × 57,219.07
  4. Step 4: Simplify right side
    91,209.15x = 7,202,207,255.20
  5. Step 5: Solve for x
    x = 7,202,207,255.20/91,209.15
  6. Step 6: Final answer
    x = 78,963.65

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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.