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Finding the Fourth Proportional to 64,878.56, 89,533.80 and 36,578.78

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Solution

The fourth proportional to 64,878.56, 89,533.80 and 36,578.78 is: 50,479.50

Step by Step Solution

  1. Step 1: Write the proportion equation
    64,878.56 : 89,533.80 = 36,578.78 : x
  2. Step 2: Convert to fraction form
    64,878.56/89,533.80 = 36,578.78/x
  3. Step 3: Cross multiply
    64,878.56x = 89,533.80 × 36,578.78
  4. Step 4: Simplify right side
    64,878.56x = 3,275,037,172.76
  5. Step 5: Solve for x
    x = 3,275,037,172.76/64,878.56
  6. Step 6: Final answer
    x = 50,479.50

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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.