Home / 212,919.60-319,379.40-142,417.20

Finding the Fourth Proportional to 212,919.60, 319,379.40 and 142,417.20

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Solution

The fourth proportional to 212,919.60, 319,379.40 and 142,417.20 is: 213,625.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    212,919.60 : 319,379.40 = 142,417.20 : x
  2. Step 2: Convert to fraction form
    212,919.60/319,379.40 = 142,417.20/x
  3. Step 3: Cross multiply
    212,919.60x = 319,379.40 × 142,417.20
  4. Step 4: Simplify right side
    212,919.60x = 45,485,119,885.68
  5. Step 5: Solve for x
    x = 45,485,119,885.68/212,919.60
  6. Step 6: Final answer
    x = 213,625.80

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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.