Home / 85,824,392.80-128,736,589.20-81,843,080.80

Finding the Fourth Proportional to 85,824,392.80, 128,736,589.20 and 81,843,080.80

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Solution

The fourth proportional to 85,824,392.80, 128,736,589.20 and 81,843,080.80 is: 122,764,621.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    85,824,392.80 : 128,736,589.20 = 81,843,080.80 : x
  2. Step 2: Convert to fraction form
    85,824,392.80/128,736,589.20 = 81,843,080.80/x
  3. Step 3: Cross multiply
    85,824,392.80x = 128,736,589.20 × 81,843,080.80
  4. Step 4: Simplify right side
    85,824,392.80x = 10,536,199,071,812,008
  5. Step 5: Solve for x
    x = 10,536,199,071,812,008/85,824,392.80
  6. Step 6: Final answer
    x = 122,764,621.20

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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.