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Finding the Fourth Proportional to 212,856.39, 319,317.39 and 72,582.21

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Solution

The fourth proportional to 212,856.39, 319,317.39 and 72,582.21 is: 108,884.50

Step by Step Solution

  1. Step 1: Write the proportion equation
    212,856.39 : 319,317.39 = 72,582.21 : x
  2. Step 2: Convert to fraction form
    212,856.39/319,317.39 = 72,582.21/x
  3. Step 3: Cross multiply
    212,856.39x = 319,317.39 × 72,582.21
  4. Step 4: Simplify right side
    212,856.39x = 23,176,761,857.63
  5. Step 5: Solve for x
    x = 23,176,761,857.63/212,856.39
  6. Step 6: Final answer
    x = 108,884.50

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1.5x scale

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.