Home / 143,400.38-197,889.90-79,737.62

Finding the Fourth Proportional to 143,400.38, 197,889.90 and 79,737.62

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Solution

The fourth proportional to 143,400.38, 197,889.90 and 79,737.62 is: 110,036.46

Step by Step Solution

  1. Step 1: Write the proportion equation
    143,400.38 : 197,889.90 = 79,737.62 : x
  2. Step 2: Convert to fraction form
    143,400.38/197,889.90 = 79,737.62/x
  3. Step 3: Cross multiply
    143,400.38x = 197,889.90 × 79,737.62
  4. Step 4: Simplify right side
    143,400.38x = 15,779,269,648.04
  5. Step 5: Solve for x
    x = 15,779,269,648.04/143,400.38
  6. Step 6: Final answer
    x = 110,036.46

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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.