Home / 128,722,977.20-193,084,465.80-103,213,809.20

Finding the Fourth Proportional to 128,722,977.20, 193,084,465.80 and 103,213,809.20

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Solution

The fourth proportional to 128,722,977.20, 193,084,465.80 and 103,213,809.20 is: 154,820,713.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    128,722,977.20 : 193,084,465.80 = 103,213,809.20 : x
  2. Step 2: Convert to fraction form
    128,722,977.20/193,084,465.80 = 103,213,809.20/x
  3. Step 3: Cross multiply
    128,722,977.20x = 193,084,465.80 × 103,213,809.20
  4. Step 4: Simplify right side
    128,722,977.20x = 19,928,983,212,565,128
  5. Step 5: Solve for x
    x = 19,928,983,212,565,128/128,722,977.20
  6. Step 6: Final answer
    x = 154,820,713.80

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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.