Home / 140,128.80-210,047.40-76,851.60

Finding the Fourth Proportional to 140,128.80, 210,047.40 and 76,851.60

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Solution

The fourth proportional to 140,128.80, 210,047.40 and 76,851.60 is: 115,197.44

Step by Step Solution

  1. Step 1: Write the proportion equation
    140,128.80 : 210,047.40 = 76,851.60 : x
  2. Step 2: Convert to fraction form
    140,128.80/210,047.40 = 76,851.60/x
  3. Step 3: Cross multiply
    140,128.80x = 210,047.40 × 76,851.60
  4. Step 4: Simplify right side
    140,128.80x = 16,142,478,765.84
  5. Step 5: Solve for x
    x = 16,142,478,765.84/140,128.80
  6. Step 6: Final answer
    x = 115,197.44

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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.