Home / 212,904.73-319,350.18-86,507.62

Finding the Fourth Proportional to 212,904.73, 319,350.18 and 86,507.62

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Solution

The fourth proportional to 212,904.73, 319,350.18 and 86,507.62 is: 129,758.62

Step by Step Solution

  1. Step 1: Write the proportion equation
    212,904.73 : 319,350.18 = 86,507.62 : x
  2. Step 2: Convert to fraction form
    212,904.73/319,350.18 = 86,507.62/x
  3. Step 3: Cross multiply
    212,904.73x = 319,350.18 × 86,507.62
  4. Step 4: Simplify right side
    212,904.73x = 27,626,224,018.37
  5. Step 5: Solve for x
    x = 27,626,224,018.37/212,904.73
  6. Step 6: Final answer
    x = 129,758.62

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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.