Home / 91,210.15-125,872.13-57,220.07

Finding the Fourth Proportional to 91,210.15, 125,872.13 and 57,220.07

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Solution

The fourth proportional to 91,210.15, 125,872.13 and 57,220.07 is: 78,965.03

Step by Step Solution

  1. Step 1: Write the proportion equation
    91,210.15 : 125,872.13 = 57,220.07 : x
  2. Step 2: Convert to fraction form
    91,210.15/125,872.13 = 57,220.07/x
  3. Step 3: Cross multiply
    91,210.15x = 125,872.13 × 57,220.07
  4. Step 4: Simplify right side
    91,210.15x = 7,202,412,089.65
  5. Step 5: Solve for x
    x = 7,202,412,089.65/91,210.15
  6. Step 6: Final answer
    x = 78,965.03

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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.