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Finding the Fourth Proportional to 64,787.36, 89,409.56 and 36,108.90

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Solution

The fourth proportional to 64,787.36, 89,409.56 and 36,108.90 is: 49,831.96

Step by Step Solution

  1. Step 1: Write the proportion equation
    64,787.36 : 89,409.56 = 36,108.90 : x
  2. Step 2: Convert to fraction form
    64,787.36/89,409.56 = 36,108.90/x
  3. Step 3: Cross multiply
    64,787.36x = 89,409.56 × 36,108.90
  4. Step 4: Simplify right side
    64,787.36x = 3,228,480,680.54
  5. Step 5: Solve for x
    x = 3,228,480,680.54/64,787.36
  6. Step 6: Final answer
    x = 49,831.96

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.