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Finding the Fourth Proportional to 64,728.56, 89,330.76 and 36,053.72

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Solution

The fourth proportional to 64,728.56, 89,330.76 and 36,053.72 is: 49,757.11

Step by Step Solution

  1. Step 1: Write the proportion equation
    64,728.56 : 89,330.76 = 36,053.72 : x
  2. Step 2: Convert to fraction form
    64,728.56/89,330.76 = 36,053.72/x
  3. Step 3: Cross multiply
    64,728.56x = 89,330.76 × 36,053.72
  4. Step 4: Simplify right side
    64,728.56x = 3,220,706,208.43
  5. Step 5: Solve for x
    x = 3,220,706,208.43/64,728.56
  6. Step 6: Final answer
    x = 49,757.11

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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.