Home / 121,023.20-181,534.80-87,586.40

Finding the Fourth Proportional to 121,023.20, 181,534.80 and 87,586.40

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Solution

The fourth proportional to 121,023.20, 181,534.80 and 87,586.40 is: 131,379.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    121,023.20 : 181,534.80 = 87,586.40 : x
  2. Step 2: Convert to fraction form
    121,023.20/181,534.80 = 87,586.40/x
  3. Step 3: Cross multiply
    121,023.20x = 181,534.80 × 87,586.40
  4. Step 4: Simplify right side
    121,023.20x = 15,899,979,606.72
  5. Step 5: Solve for x
    x = 15,899,979,606.72/121,023.20
  6. Step 6: Final answer
    x = 131,379.60

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.