Home / 212,985.50-319,456.98-86,633.19

Finding the Fourth Proportional to 212,985.50, 319,456.98 and 86,633.19

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Solution

The fourth proportional to 212,985.50, 319,456.98 and 86,633.19 is: 129,941.14

Step by Step Solution

  1. Step 1: Write the proportion equation
    212,985.50 : 319,456.98 = 86,633.19 : x
  2. Step 2: Convert to fraction form
    212,985.50/319,456.98 = 86,633.19/x
  3. Step 3: Cross multiply
    212,985.50x = 319,456.98 × 86,633.19
  4. Step 4: Simplify right side
    212,985.50x = 27,675,577,245.17
  5. Step 5: Solve for x
    x = 27,675,577,245.17/212,985.50
  6. Step 6: Final answer
    x = 129,941.14

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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.