Home / 78,150.66-117,176.28-66,308.46

Finding the Fourth Proportional to 78,150.66, 117,176.28 and 66,308.46

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Solution

The fourth proportional to 78,150.66, 117,176.28 and 66,308.46 is: 99,420.51

Step by Step Solution

  1. Step 1: Write the proportion equation
    78,150.66 : 117,176.28 = 66,308.46 : x
  2. Step 2: Convert to fraction form
    78,150.66/117,176.28 = 66,308.46/x
  3. Step 3: Cross multiply
    78,150.66x = 117,176.28 × 66,308.46
  4. Step 4: Simplify right side
    78,150.66x = 7,769,778,675.33
  5. Step 5: Solve for x
    x = 7,769,778,675.33/78,150.66
  6. Step 6: Final answer
    x = 99,420.51

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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.