Home / 212,813.51-319,314.30-111,587.39

Finding the Fourth Proportional to 212,813.51, 319,314.30 and 111,587.39

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Solution

The fourth proportional to 212,813.51, 319,314.30 and 111,587.39 is: 167,430.39

Step by Step Solution

  1. Step 1: Write the proportion equation
    212,813.51 : 319,314.30 = 111,587.39 : x
  2. Step 2: Convert to fraction form
    212,813.51/319,314.30 = 111,587.39/x
  3. Step 3: Cross multiply
    212,813.51x = 319,314.30 × 111,587.39
  4. Step 4: Simplify right side
    212,813.51x = 35,631,447,172.17
  5. Step 5: Solve for x
    x = 35,631,447,172.17/212,813.51
  6. Step 6: Final answer
    x = 167,430.39

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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.