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Finding the Fourth Proportional to 74,258.01, 102,469.73 and 42,420.69

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Solution

The fourth proportional to 74,258.01, 102,469.73 and 42,420.69 is: 58,536.94

Step by Step Solution

  1. Step 1: Write the proportion equation
    74,258.01 : 102,469.73 = 42,420.69 : x
  2. Step 2: Convert to fraction form
    74,258.01/102,469.73 = 42,420.69/x
  3. Step 3: Cross multiply
    74,258.01x = 102,469.73 × 42,420.69
  4. Step 4: Simplify right side
    74,258.01x = 4,346,836,438.61
  5. Step 5: Solve for x
    x = 4,346,836,438.61/74,258.01
  6. Step 6: Final answer
    x = 58,536.94

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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.