Home / 78,679.28-117,879.00-45,330.45

Finding the Fourth Proportional to 78,679.28, 117,879.00 and 45,330.45

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Solution

The fourth proportional to 78,679.28, 117,879.00 and 45,330.45 is: 67,915.05

Step by Step Solution

  1. Step 1: Write the proportion equation
    78,679.28 : 117,879.00 = 45,330.45 : x
  2. Step 2: Convert to fraction form
    78,679.28/117,879.00 = 45,330.45/x
  3. Step 3: Cross multiply
    78,679.28x = 117,879.00 × 45,330.45
  4. Step 4: Simplify right side
    78,679.28x = 5,343,507,503.51
  5. Step 5: Solve for x
    x = 5,343,507,503.51/78,679.28
  6. Step 6: Final answer
    x = 67,915.05

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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.