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Finding the Fourth Proportional to 212,890.95, 319,398.05 and 63,134.84

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Solution

The fourth proportional to 212,890.95, 319,398.05 and 63,134.84 is: 94,720.53

Step by Step Solution

  1. Step 1: Write the proportion equation
    212,890.95 : 319,398.05 = 63,134.84 : x
  2. Step 2: Convert to fraction form
    212,890.95/319,398.05 = 63,134.84/x
  3. Step 3: Cross multiply
    212,890.95x = 319,398.05 × 63,134.84
  4. Step 4: Simplify right side
    212,890.95x = 20,165,143,851.38
  5. Step 5: Solve for x
    x = 20,165,143,851.38/212,890.95
  6. Step 6: Final answer
    x = 94,720.53

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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.