Home / 80,124,004.80-120,186,007.20-76,988,721.60

Finding the Fourth Proportional to 80,124,004.80, 120,186,007.20 and 76,988,721.60

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Solution

The fourth proportional to 80,124,004.80, 120,186,007.20 and 76,988,721.60 is: 115,483,082.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    80,124,004.80 : 120,186,007.20 = 76,988,721.60 : x
  2. Step 2: Convert to fraction form
    80,124,004.80/120,186,007.20 = 76,988,721.60/x
  3. Step 3: Cross multiply
    80,124,004.80x = 120,186,007.20 × 76,988,721.60
  4. Step 4: Simplify right side
    80,124,004.80x = 9,252,967,048,536,396
  5. Step 5: Solve for x
    x = 9,252,967,048,536,396/80,124,004.80
  6. Step 6: Final answer
    x = 115,483,082.40

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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.