Home / 143,139.90-197,514.47-79,465.40

Finding the Fourth Proportional to 143,139.90, 197,514.47 and 79,465.40

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Solution

The fourth proportional to 143,139.90, 197,514.47 and 79,465.40 is: 109,651.92

Step by Step Solution

  1. Step 1: Write the proportion equation
    143,139.90 : 197,514.47 = 79,465.40 : x
  2. Step 2: Convert to fraction form
    143,139.90/197,514.47 = 79,465.40/x
  3. Step 3: Cross multiply
    143,139.90x = 197,514.47 × 79,465.40
  4. Step 4: Simplify right side
    143,139.90x = 15,695,565,575.43
  5. Step 5: Solve for x
    x = 15,695,565,575.43/143,139.90
  6. Step 6: Final answer
    x = 109,651.92

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.