Home / 257,247.12-385,885.26-79,779.36

Finding the Fourth Proportional to 257,247.12, 385,885.26 and 79,779.36

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Solution

The fourth proportional to 257,247.12, 385,885.26 and 79,779.36 is: 119,673.56

Step by Step Solution

  1. Step 1: Write the proportion equation
    257,247.12 : 385,885.26 = 79,779.36 : x
  2. Step 2: Convert to fraction form
    257,247.12/385,885.26 = 79,779.36/x
  3. Step 3: Cross multiply
    257,247.12x = 385,885.26 × 79,779.36
  4. Step 4: Simplify right side
    257,247.12x = 30,785,679,076.23
  5. Step 5: Solve for x
    x = 30,785,679,076.23/257,247.12
  6. Step 6: Final answer
    x = 119,673.56

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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.