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Finding the Fourth Proportional to 212,879.64, 319,320.76 and 63,121.34

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Solution

The fourth proportional to 212,879.64, 319,320.76 and 63,121.34 is: 94,682.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    212,879.64 : 319,320.76 = 63,121.34 : x
  2. Step 2: Convert to fraction form
    212,879.64/319,320.76 = 63,121.34/x
  3. Step 3: Cross multiply
    212,879.64x = 319,320.76 × 63,121.34
  4. Step 4: Simplify right side
    212,879.64x = 20,155,954,261.02
  5. Step 5: Solve for x
    x = 20,155,954,261.02/212,879.64
  6. Step 6: Final answer
    x = 94,682.40

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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.