Home / 212,964.15-319,807.78-142,340.62

Finding the Fourth Proportional to 212,964.15, 319,807.78 and 142,340.62

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Solution

The fourth proportional to 212,964.15, 319,807.78 and 142,340.62 is: 213,752.59

Step by Step Solution

  1. Step 1: Write the proportion equation
    212,964.15 : 319,807.78 = 142,340.62 : x
  2. Step 2: Convert to fraction form
    212,964.15/319,807.78 = 142,340.62/x
  3. Step 3: Cross multiply
    212,964.15x = 319,807.78 × 142,340.62
  4. Step 4: Simplify right side
    212,964.15x = 45,521,637,686.02
  5. Step 5: Solve for x
    x = 45,521,637,686.02/212,964.15
  6. Step 6: Final answer
    x = 213,752.59

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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.