Home / 151,520.40-209,079.90-86,986.08

Finding the Fourth Proportional to 151,520.40, 209,079.90 and 86,986.08

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Solution

The fourth proportional to 151,520.40, 209,079.90 and 86,986.08 is: 120,030.31

Step by Step Solution

  1. Step 1: Write the proportion equation
    151,520.40 : 209,079.90 = 86,986.08 : x
  2. Step 2: Convert to fraction form
    151,520.40/209,079.90 = 86,986.08/x
  3. Step 3: Cross multiply
    151,520.40x = 209,079.90 × 86,986.08
  4. Step 4: Simplify right side
    151,520.40x = 18,187,040,907.79
  5. Step 5: Solve for x
    x = 18,187,040,907.79/151,520.40
  6. Step 6: Final answer
    x = 120,030.31

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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.