Home / 143,422.64-197,928.12-78,894.62

Finding the Fourth Proportional to 143,422.64, 197,928.12 and 78,894.62

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Solution

The fourth proportional to 143,422.64, 197,928.12 and 78,894.62 is: 108,877.26

Step by Step Solution

  1. Step 1: Write the proportion equation
    143,422.64 : 197,928.12 = 78,894.62 : x
  2. Step 2: Convert to fraction form
    143,422.64/197,928.12 = 78,894.62/x
  3. Step 3: Cross multiply
    143,422.64x = 197,928.12 × 78,894.62
  4. Step 4: Simplify right side
    143,422.64x = 15,615,463,814.71
  5. Step 5: Solve for x
    x = 15,615,463,814.71/143,422.64
  6. Step 6: Final answer
    x = 108,877.26

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.