Home / 78,907.20-118,312.20-45,610.80

Finding the Fourth Proportional to 78,907.20, 118,312.20 and 45,610.80

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Solution

The fourth proportional to 78,907.20, 118,312.20 and 45,610.80 is: 68,388.11

Step by Step Solution

  1. Step 1: Write the proportion equation
    78,907.20 : 118,312.20 = 45,610.80 : x
  2. Step 2: Convert to fraction form
    78,907.20/118,312.20 = 45,610.80/x
  3. Step 3: Cross multiply
    78,907.20x = 118,312.20 × 45,610.80
  4. Step 4: Simplify right side
    78,907.20x = 5,396,314,091.76
  5. Step 5: Solve for x
    x = 5,396,314,091.76/78,907.20
  6. Step 6: Final answer
    x = 68,388.11

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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.