Home / 140,005.20-210,007.80-76,800.90

Finding the Fourth Proportional to 140,005.20, 210,007.80 and 76,800.90

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Solution

The fourth proportional to 140,005.20, 210,007.80 and 76,800.90 is: 115,201.35

Step by Step Solution

  1. Step 1: Write the proportion equation
    140,005.20 : 210,007.80 = 76,800.90 : x
  2. Step 2: Convert to fraction form
    140,005.20/210,007.80 = 76,800.90/x
  3. Step 3: Cross multiply
    140,005.20x = 210,007.80 × 76,800.90
  4. Step 4: Simplify right side
    140,005.20x = 16,128,788,047.02
  5. Step 5: Solve for x
    x = 16,128,788,047.02/140,005.20
  6. Step 6: Final answer
    x = 115,201.35

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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.