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Finding the Fourth Proportional to 107,399.20, 160,940.40 and 77,879.20

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Solution

The fourth proportional to 107,399.20, 160,940.40 and 77,879.20 is: 116,703.94

Step by Step Solution

  1. Step 1: Write the proportion equation
    107,399.20 : 160,940.40 = 77,879.20 : x
  2. Step 2: Convert to fraction form
    107,399.20/160,940.40 = 77,879.20/x
  3. Step 3: Cross multiply
    107,399.20x = 160,940.40 × 77,879.20
  4. Step 4: Simplify right side
    107,399.20x = 12,533,909,599.68
  5. Step 5: Solve for x
    x = 12,533,909,599.68/107,399.20
  6. Step 6: Final answer
    x = 116,703.94

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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.