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Finding the Fourth Proportional to 109,903.80, 164,661.30 and 102,905.40

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Solution

The fourth proportional to 109,903.80, 164,661.30 and 102,905.40 is: 154,176.08

Step by Step Solution

  1. Step 1: Write the proportion equation
    109,903.80 : 164,661.30 = 102,905.40 : x
  2. Step 2: Convert to fraction form
    109,903.80/164,661.30 = 102,905.40/x
  3. Step 3: Cross multiply
    109,903.80x = 164,661.30 × 102,905.40
  4. Step 4: Simplify right side
    109,903.80x = 16,944,536,941.02
  5. Step 5: Solve for x
    x = 16,944,536,941.02/109,903.80
  6. Step 6: Final answer
    x = 154,176.08

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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.