Home / 212,810.32-319,288.40-72,667.36

Finding the Fourth Proportional to 212,810.32, 319,288.40 and 72,667.36

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Solution

The fourth proportional to 212,810.32, 319,288.40 and 72,667.36 is: 109,025.94

Step by Step Solution

  1. Step 1: Write the proportion equation
    212,810.32 : 319,288.40 = 72,667.36 : x
  2. Step 2: Convert to fraction form
    212,810.32/319,288.40 = 72,667.36/x
  3. Step 3: Cross multiply
    212,810.32x = 319,288.40 × 72,667.36
  4. Step 4: Simplify right side
    212,810.32x = 23,201,845,106.62
  5. Step 5: Solve for x
    x = 23,201,845,106.62/212,810.32
  6. Step 6: Final answer
    x = 109,025.94

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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.