Home / 50,779.20-76,168.80-21,187.20

Finding the Fourth Proportional to 50,779.20, 76,168.80 and 21,187.20

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Solution

The fourth proportional to 50,779.20, 76,168.80 and 21,187.20 is: 31,780.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    50,779.20 : 76,168.80 = 21,187.20 : x
  2. Step 2: Convert to fraction form
    50,779.20/76,168.80 = 21,187.20/x
  3. Step 3: Cross multiply
    50,779.20x = 76,168.80 × 21,187.20
  4. Step 4: Simplify right side
    50,779.20x = 1,613,803,599.36
  5. Step 5: Solve for x
    x = 1,613,803,599.36/50,779.20
  6. Step 6: Final answer
    x = 31,780.80

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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.