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Finding the Fourth Proportional to 212,967.92, 319,480.68 and 72,688.88

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Solution

The fourth proportional to 212,967.92, 319,480.68 and 72,688.88 is: 109,043.15

Step by Step Solution

  1. Step 1: Write the proportion equation
    212,967.92 : 319,480.68 = 72,688.88 : x
  2. Step 2: Convert to fraction form
    212,967.92/319,480.68 = 72,688.88/x
  3. Step 3: Cross multiply
    212,967.92x = 319,480.68 × 72,688.88
  4. Step 4: Simplify right side
    212,967.92x = 23,222,692,810.84
  5. Step 5: Solve for x
    x = 23,222,692,810.84/212,967.92
  6. Step 6: Final answer
    x = 109,043.15

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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.