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Finding the Fourth Proportional to 163,398.32, 245,304.88 and 138,929.84

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Solution

The fourth proportional to 163,398.32, 245,304.88 and 138,929.84 is: 208,571.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    163,398.32 : 245,304.88 = 138,929.84 : x
  2. Step 2: Convert to fraction form
    163,398.32/245,304.88 = 138,929.84/x
  3. Step 3: Cross multiply
    163,398.32x = 245,304.88 × 138,929.84
  4. Step 4: Simplify right side
    163,398.32x = 34,080,167,729.62
  5. Step 5: Solve for x
    x = 34,080,167,729.62/163,398.32
  6. Step 6: Final answer
    x = 208,571.10

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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.