Home / 78,849.20-118,273.80-72,887.60

Finding the Fourth Proportional to 78,849.20, 118,273.80 and 72,887.60

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Solution

The fourth proportional to 78,849.20, 118,273.80 and 72,887.60 is: 109,331.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    78,849.20 : 118,273.80 = 72,887.60 : x
  2. Step 2: Convert to fraction form
    78,849.20/118,273.80 = 72,887.60/x
  3. Step 3: Cross multiply
    78,849.20x = 118,273.80 × 72,887.60
  4. Step 4: Simplify right side
    78,849.20x = 8,620,693,424.88
  5. Step 5: Solve for x
    x = 8,620,693,424.88/78,849.20
  6. Step 6: Final answer
    x = 109,331.40

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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.