Home / 142,121.85-213,145.65-42,255.15

Finding the Fourth Proportional to 142,121.85, 213,145.65 and 42,255.15

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Solution

The fourth proportional to 142,121.85, 213,145.65 and 42,255.15 is: 63,371.69

Step by Step Solution

  1. Step 1: Write the proportion equation
    142,121.85 : 213,145.65 = 42,255.15 : x
  2. Step 2: Convert to fraction form
    142,121.85/213,145.65 = 42,255.15/x
  3. Step 3: Cross multiply
    142,121.85x = 213,145.65 × 42,255.15
  4. Step 4: Simplify right side
    142,121.85x = 9,006,501,412.60
  5. Step 5: Solve for x
    x = 9,006,501,412.60/142,121.85
  6. Step 6: Final answer
    x = 63,371.69

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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.