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Finding the Fourth Proportional to 163,686.90, 245,447.32 and 74,864.31

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Solution

The fourth proportional to 163,686.90, 245,447.32 and 74,864.31 is: 112,258.49

Step by Step Solution

  1. Step 1: Write the proportion equation
    163,686.90 : 245,447.32 = 74,864.31 : x
  2. Step 2: Convert to fraction form
    163,686.90/245,447.32 = 74,864.31/x
  3. Step 3: Cross multiply
    163,686.90x = 245,447.32 × 74,864.31
  4. Step 4: Simplify right side
    163,686.90x = 18,375,244,253.15
  5. Step 5: Solve for x
    x = 18,375,244,253.15/163,686.90
  6. Step 6: Final answer
    x = 112,258.49

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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.