Home / 109,844.20-164,420.70-78,740.20

Finding the Fourth Proportional to 109,844.20, 164,420.70 and 78,740.20

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Solution

The fourth proportional to 109,844.20, 164,420.70 and 78,740.20 is: 117,862.56

Step by Step Solution

  1. Step 1: Write the proportion equation
    109,844.20 : 164,420.70 = 78,740.20 : x
  2. Step 2: Convert to fraction form
    109,844.20/164,420.70 = 78,740.20/x
  3. Step 3: Cross multiply
    109,844.20x = 164,420.70 × 78,740.20
  4. Step 4: Simplify right side
    109,844.20x = 12,946,518,802.14
  5. Step 5: Solve for x
    x = 12,946,518,802.14/109,844.20
  6. Step 6: Final answer
    x = 117,862.56

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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.