Home / 85,834,825.80-128,752,238.70-76,428,976.20

Finding the Fourth Proportional to 85,834,825.80, 128,752,238.70 and 76,428,976.20

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Solution

The fourth proportional to 85,834,825.80, 128,752,238.70 and 76,428,976.20 is: 114,643,464.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    85,834,825.80 : 128,752,238.70 = 76,428,976.20 : x
  2. Step 2: Convert to fraction form
    85,834,825.80/128,752,238.70 = 76,428,976.20/x
  3. Step 3: Cross multiply
    85,834,825.80x = 128,752,238.70 × 76,428,976.20
  4. Step 4: Simplify right side
    85,834,825.80x = 9,840,401,787,299,020
  5. Step 5: Solve for x
    x = 9,840,401,787,299,020/85,834,825.80
  6. Step 6: Final answer
    x = 114,643,464.30

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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.