Home / 81,130,228.88-121,694,280.32-19,719,209.18

Finding the Fourth Proportional to 81,130,228.88, 121,694,280.32 and 19,719,209.18

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Solution

The fourth proportional to 81,130,228.88, 121,694,280.32 and 19,719,209.18 is: 29,578,555.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    81,130,228.88 : 121,694,280.32 = 19,719,209.18 : x
  2. Step 2: Convert to fraction form
    81,130,228.88/121,694,280.32 = 19,719,209.18/x
  3. Step 3: Cross multiply
    81,130,228.88x = 121,694,280.32 × 19,719,209.18
  4. Step 4: Simplify right side
    81,130,228.88x = 2,399,714,969,639,637
  5. Step 5: Solve for x
    x = 2,399,714,969,639,637/81,130,228.88
  6. Step 6: Final answer
    x = 29,578,555.40

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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.