Home / 129,810.08-195,078.64-77,227.68

Finding the Fourth Proportional to 129,810.08, 195,078.64 and 77,227.68

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Solution

The fourth proportional to 129,810.08, 195,078.64 and 77,227.68 is: 116,057.79

Step by Step Solution

  1. Step 1: Write the proportion equation
    129,810.08 : 195,078.64 = 77,227.68 : x
  2. Step 2: Convert to fraction form
    129,810.08/195,078.64 = 77,227.68/x
  3. Step 3: Cross multiply
    129,810.08x = 195,078.64 × 77,227.68
  4. Step 4: Simplify right side
    129,810.08x = 15,065,470,784.76
  5. Step 5: Solve for x
    x = 15,065,470,784.76/129,810.08
  6. Step 6: Final answer
    x = 116,057.79

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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.