Home / 143,020.86-197,368.16-79,358.51

Finding the Fourth Proportional to 143,020.86, 197,368.16 and 79,358.51

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Solution

The fourth proportional to 143,020.86, 197,368.16 and 79,358.51 is: 109,514.39

Step by Step Solution

  1. Step 1: Write the proportion equation
    143,020.86 : 197,368.16 = 79,358.51 : x
  2. Step 2: Convert to fraction form
    143,020.86/197,368.16 = 79,358.51/x
  3. Step 3: Cross multiply
    143,020.86x = 197,368.16 × 79,358.51
  4. Step 4: Simplify right side
    143,020.86x = 15,662,841,715.41
  5. Step 5: Solve for x
    x = 15,662,841,715.41/143,020.86
  6. Step 6: Final answer
    x = 109,514.39

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1.5x scale

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.