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Finding the Fourth Proportional to 109,341.60, 164,012.40 and 82,903.20

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Solution

The fourth proportional to 109,341.60, 164,012.40 and 82,903.20 is: 124,354.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    109,341.60 : 164,012.40 = 82,903.20 : x
  2. Step 2: Convert to fraction form
    109,341.60/164,012.40 = 82,903.20/x
  3. Step 3: Cross multiply
    109,341.60x = 164,012.40 × 82,903.20
  4. Step 4: Simplify right side
    109,341.60x = 13,597,152,799.68
  5. Step 5: Solve for x
    x = 13,597,152,799.68/109,341.60
  6. Step 6: Final answer
    x = 124,354.80

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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.