Home / 109,326.20-163,989.30-72,001.40

Finding the Fourth Proportional to 109,326.20, 163,989.30 and 72,001.40

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Solution

The fourth proportional to 109,326.20, 163,989.30 and 72,001.40 is: 108,002.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    109,326.20 : 163,989.30 = 72,001.40 : x
  2. Step 2: Convert to fraction form
    109,326.20/163,989.30 = 72,001.40/x
  3. Step 3: Cross multiply
    109,326.20x = 163,989.30 × 72,001.40
  4. Step 4: Simplify right side
    109,326.20x = 11,807,459,185.02
  5. Step 5: Solve for x
    x = 11,807,459,185.02/109,326.20
  6. Step 6: Final answer
    x = 108,002.10

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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.