Home / 78,327.81-117,491.18-19,164.33

Finding the Fourth Proportional to 78,327.81, 117,491.18 and 19,164.33

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Solution

The fourth proportional to 78,327.81, 117,491.18 and 19,164.33 is: 28,746.36

Step by Step Solution

  1. Step 1: Write the proportion equation
    78,327.81 : 117,491.18 = 19,164.33 : x
  2. Step 2: Convert to fraction form
    78,327.81/117,491.18 = 19,164.33/x
  3. Step 3: Cross multiply
    78,327.81x = 117,491.18 × 19,164.33
  4. Step 4: Simplify right side
    78,327.81x = 2,251,639,649.79
  5. Step 5: Solve for x
    x = 2,251,639,649.79/78,327.81
  6. Step 6: Final answer
    x = 28,746.36

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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.