Home / 109,875.20-164,812.80-72,939.20

Finding the Fourth Proportional to 109,875.20, 164,812.80 and 72,939.20

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Solution

The fourth proportional to 109,875.20, 164,812.80 and 72,939.20 is: 109,408.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    109,875.20 : 164,812.80 = 72,939.20 : x
  2. Step 2: Convert to fraction form
    109,875.20/164,812.80 = 72,939.20/x
  3. Step 3: Cross multiply
    109,875.20x = 164,812.80 × 72,939.20
  4. Step 4: Simplify right side
    109,875.20x = 12,021,313,781.76
  5. Step 5: Solve for x
    x = 12,021,313,781.76/109,875.20
  6. Step 6: Final answer
    x = 109,408.80

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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.