Home / 80,933,720.80-121,400,581.20-72,430,664.80

Finding the Fourth Proportional to 80,933,720.80, 121,400,581.20 and 72,430,664.80

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Solution

The fourth proportional to 80,933,720.80, 121,400,581.20 and 72,430,664.80 is: 108,645,997.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    80,933,720.80 : 121,400,581.20 = 72,430,664.80 : x
  2. Step 2: Convert to fraction form
    80,933,720.80/121,400,581.20 = 72,430,664.80/x
  3. Step 3: Cross multiply
    80,933,720.80x = 121,400,581.20 × 72,430,664.80
  4. Step 4: Simplify right side
    80,933,720.80x = 8,793,124,803,422,382
  5. Step 5: Solve for x
    x = 8,793,124,803,422,382/80,933,720.80
  6. Step 6: Final answer
    x = 108,645,997.20

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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.