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Finding the Fourth Proportional to 74,123.79, 102,307.64 and 57,959.12

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Solution

The fourth proportional to 74,123.79, 102,307.64 and 57,959.12 is: 79,996.73

Step by Step Solution

  1. Step 1: Write the proportion equation
    74,123.79 : 102,307.64 = 57,959.12 : x
  2. Step 2: Convert to fraction form
    74,123.79/102,307.64 = 57,959.12/x
  3. Step 3: Cross multiply
    74,123.79x = 102,307.64 × 57,959.12
  4. Step 4: Simplify right side
    74,123.79x = 5,929,660,783.68
  5. Step 5: Solve for x
    x = 5,929,660,783.68/74,123.79
  6. Step 6: Final answer
    x = 79,996.73

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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.