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Finding the Fourth Proportional to 212,865.72, 319,360.14 and 63,109.68

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Solution

The fourth proportional to 212,865.72, 319,360.14 and 63,109.68 is: 94,682.77

Step by Step Solution

  1. Step 1: Write the proportion equation
    212,865.72 : 319,360.14 = 63,109.68 : x
  2. Step 2: Convert to fraction form
    212,865.72/319,360.14 = 63,109.68/x
  3. Step 3: Cross multiply
    212,865.72x = 319,360.14 × 63,109.68
  4. Step 4: Simplify right side
    212,865.72x = 20,154,716,240.16
  5. Step 5: Solve for x
    x = 20,154,716,240.16/212,865.72
  6. Step 6: Final answer
    x = 94,682.77

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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.