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Finding the Fourth Proportional to 64,772.40, 89,384.40 and 36,478.20

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Solution

The fourth proportional to 64,772.40, 89,384.40 and 36,478.20 is: 50,339.06

Step by Step Solution

  1. Step 1: Write the proportion equation
    64,772.40 : 89,384.40 = 36,478.20 : x
  2. Step 2: Convert to fraction form
    64,772.40/89,384.40 = 36,478.20/x
  3. Step 3: Cross multiply
    64,772.40x = 89,384.40 × 36,478.20
  4. Step 4: Simplify right side
    64,772.40x = 3,260,582,020.08
  5. Step 5: Solve for x
    x = 3,260,582,020.08/64,772.40
  6. Step 6: Final answer
    x = 50,339.06

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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.