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Finding the Fourth Proportional to 109,395.60, 164,044.80 and 42,813.60

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Solution

The fourth proportional to 109,395.60, 164,044.80 and 42,813.60 is: 64,201.38

Step by Step Solution

  1. Step 1: Write the proportion equation
    109,395.60 : 164,044.80 = 42,813.60 : x
  2. Step 2: Convert to fraction form
    109,395.60/164,044.80 = 42,813.60/x
  3. Step 3: Cross multiply
    109,395.60x = 164,044.80 × 42,813.60
  4. Step 4: Simplify right side
    109,395.60x = 7,023,348,449.28
  5. Step 5: Solve for x
    x = 7,023,348,449.28/109,395.60
  6. Step 6: Final answer
    x = 64,201.38

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1.5x scale

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.