Home / 143,779.10-215,668.65-72,920.30

Finding the Fourth Proportional to 143,779.10, 215,668.65 and 72,920.30

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Solution

The fourth proportional to 143,779.10, 215,668.65 and 72,920.30 is: 109,380.45

Step by Step Solution

  1. Step 1: Write the proportion equation
    143,779.10 : 215,668.65 = 72,920.30 : x
  2. Step 2: Convert to fraction form
    143,779.10/215,668.65 = 72,920.30/x
  3. Step 3: Cross multiply
    143,779.10x = 215,668.65 × 72,920.30
  4. Step 4: Simplify right side
    143,779.10x = 15,726,622,658.60
  5. Step 5: Solve for x
    x = 15,726,622,658.60/143,779.10
  6. Step 6: Final answer
    x = 109,380.45

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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.