Home / 140,679,947.20-211,019,920.80-128,138,814.40

Finding the Fourth Proportional to 140,679,947.20, 211,019,920.80 and 128,138,814.40

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Solution

The fourth proportional to 140,679,947.20, 211,019,920.80 and 128,138,814.40 is: 192,208,221.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    140,679,947.20 : 211,019,920.80 = 128,138,814.40 : x
  2. Step 2: Convert to fraction form
    140,679,947.20/211,019,920.80 = 128,138,814.40/x
  3. Step 3: Cross multiply
    140,679,947.20x = 211,019,920.80 × 128,138,814.40
  4. Step 4: Simplify right side
    140,679,947.20x = 27,039,842,466,093,904
  5. Step 5: Solve for x
    x = 27,039,842,466,093,904/140,679,947.20
  6. Step 6: Final answer
    x = 192,208,221.60

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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.