Home / 79,728,012.80-119,592,019.20-78,216,358.40

Finding the Fourth Proportional to 79,728,012.80, 119,592,019.20 and 78,216,358.40

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Solution

The fourth proportional to 79,728,012.80, 119,592,019.20 and 78,216,358.40 is: 117,324,537.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    79,728,012.80 : 119,592,019.20 = 78,216,358.40 : x
  2. Step 2: Convert to fraction form
    79,728,012.80/119,592,019.20 = 78,216,358.40/x
  3. Step 3: Cross multiply
    79,728,012.80x = 119,592,019.20 × 78,216,358.40
  4. Step 4: Simplify right side
    79,728,012.80x = 9,354,052,235,526,882
  5. Step 5: Solve for x
    x = 9,354,052,235,526,882/79,728,012.80
  6. Step 6: Final answer
    x = 117,324,537.60

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1.5x scale

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.