Home / 128,722,859.20-193,084,288.80-87,908,190.40

Finding the Fourth Proportional to 128,722,859.20, 193,084,288.80 and 87,908,190.40

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Solution

The fourth proportional to 128,722,859.20, 193,084,288.80 and 87,908,190.40 is: 131,862,285.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    128,722,859.20 : 193,084,288.80 = 87,908,190.40 : x
  2. Step 2: Convert to fraction form
    128,722,859.20/193,084,288.80 = 87,908,190.40/x
  3. Step 3: Cross multiply
    128,722,859.20x = 193,084,288.80 × 87,908,190.40
  4. Step 4: Simplify right side
    128,722,859.20x = 16,973,690,423,078,990
  5. Step 5: Solve for x
    x = 16,973,690,423,078,990/128,722,859.20
  6. Step 6: Final answer
    x = 131,862,285.60

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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.