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Finding the Fourth Proportional to 64,804.48, 89,435.28 and 36,512.80

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Solution

The fourth proportional to 64,804.48, 89,435.28 and 36,512.80 is: 50,390.54

Step by Step Solution

  1. Step 1: Write the proportion equation
    64,804.48 : 89,435.28 = 36,512.80 : x
  2. Step 2: Convert to fraction form
    64,804.48/89,435.28 = 36,512.80/x
  3. Step 3: Cross multiply
    64,804.48x = 89,435.28 × 36,512.80
  4. Step 4: Simplify right side
    64,804.48x = 3,265,532,491.58
  5. Step 5: Solve for x
    x = 3,265,532,491.58/64,804.48
  6. Step 6: Final answer
    x = 50,390.54

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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.