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Finding the Fourth Proportional to 130,879.14, 195,931.19 and 80,798.21

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Solution

The fourth proportional to 130,879.14, 195,931.19 and 80,798.21 is: 120,958.07

Step by Step Solution

  1. Step 1: Write the proportion equation
    130,879.14 : 195,931.19 = 80,798.21 : x
  2. Step 2: Convert to fraction form
    130,879.14/195,931.19 = 80,798.21/x
  3. Step 3: Cross multiply
    130,879.14x = 195,931.19 × 80,798.21
  4. Step 4: Simplify right side
    130,879.14x = 15,830,888,657.51
  5. Step 5: Solve for x
    x = 15,830,888,657.51/130,879.14
  6. Step 6: Final answer
    x = 120,958.07

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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.