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Finding the Fourth Proportional to 57,808, 79,775.04 and 31,312

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Solution

The fourth proportional to 57,808, 79,775.04 and 31,312 is: 43,210.56

Step by Step Solution

  1. Step 1: Write the proportion equation
    57,808 : 79,775.04 = 31,312 : x
  2. Step 2: Convert to fraction form
    57,808/79,775.04 = 31,312/x
  3. Step 3: Cross multiply
    57,808x = 79,775.04 × 31,312
  4. Step 4: Simplify right side
    57,808x = 2,497,916,052.48
  5. Step 5: Solve for x
    x = 2,497,916,052.48/57,808
  6. Step 6: Final answer
    x = 43,210.56

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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.