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Finding the Fourth Proportional to 53,956.80, 80,935.20 and 42,803.10

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Solution

The fourth proportional to 53,956.80, 80,935.20 and 42,803.10 is: 64,204.65

Step by Step Solution

  1. Step 1: Write the proportion equation
    53,956.80 : 80,935.20 = 42,803.10 : x
  2. Step 2: Convert to fraction form
    53,956.80/80,935.20 = 42,803.10/x
  3. Step 3: Cross multiply
    53,956.80x = 80,935.20 × 42,803.10
  4. Step 4: Simplify right side
    53,956.80x = 3,464,277,459.12
  5. Step 5: Solve for x
    x = 3,464,277,459.12/53,956.80
  6. Step 6: Final answer
    x = 64,204.65

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.