Home / 120,887,999.80-181,331,999.70-87,127,718.20

Finding the Fourth Proportional to 120,887,999.80, 181,331,999.70 and 87,127,718.20

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Solution

The fourth proportional to 120,887,999.80, 181,331,999.70 and 87,127,718.20 is: 130,691,577.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    120,887,999.80 : 181,331,999.70 = 87,127,718.20 : x
  2. Step 2: Convert to fraction form
    120,887,999.80/181,331,999.70 = 87,127,718.20/x
  3. Step 3: Cross multiply
    120,887,999.80x = 181,331,999.70 × 87,127,718.20
  4. Step 4: Simplify right side
    120,887,999.80x = 15,799,043,370,504,084
  5. Step 5: Solve for x
    x = 15,799,043,370,504,084/120,887,999.80
  6. Step 6: Final answer
    x = 130,691,577.30

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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.