Home / 78,829.20-118,243.80-72,867.60

Finding the Fourth Proportional to 78,829.20, 118,243.80 and 72,867.60

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Solution

The fourth proportional to 78,829.20, 118,243.80 and 72,867.60 is: 109,301.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    78,829.20 : 118,243.80 = 72,867.60 : x
  2. Step 2: Convert to fraction form
    78,829.20/118,243.80 = 72,867.60/x
  3. Step 3: Cross multiply
    78,829.20x = 118,243.80 × 72,867.60
  4. Step 4: Simplify right side
    78,829.20x = 8,616,141,920.88
  5. Step 5: Solve for x
    x = 8,616,141,920.88/78,829.20
  6. Step 6: Final answer
    x = 109,301.40

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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.