Home / 78,740.20-118,121.10-28,808.20

Finding the Fourth Proportional to 78,740.20, 118,121.10 and 28,808.20

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Solution

The fourth proportional to 78,740.20, 118,121.10 and 28,808.20 is: 43,216.25

Step by Step Solution

  1. Step 1: Write the proportion equation
    78,740.20 : 118,121.10 = 28,808.20 : x
  2. Step 2: Convert to fraction form
    78,740.20/118,121.10 = 28,808.20/x
  3. Step 3: Cross multiply
    78,740.20x = 118,121.10 × 28,808.20
  4. Step 4: Simplify right side
    78,740.20x = 3,402,856,273.02
  5. Step 5: Solve for x
    x = 3,402,856,273.02/78,740.20
  6. Step 6: Final answer
    x = 43,216.25

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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.