Home / 209,981.80-314,972.70-121,408.30

Finding the Fourth Proportional to 209,981.80, 314,972.70 and 121,408.30

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Solution

The fourth proportional to 209,981.80, 314,972.70 and 121,408.30 is: 182,112.45

Step by Step Solution

  1. Step 1: Write the proportion equation
    209,981.80 : 314,972.70 = 121,408.30 : x
  2. Step 2: Convert to fraction form
    209,981.80/314,972.70 = 121,408.30/x
  3. Step 3: Cross multiply
    209,981.80x = 314,972.70 × 121,408.30
  4. Step 4: Simplify right side
    209,981.80x = 38,240,300,053.41
  5. Step 5: Solve for x
    x = 38,240,300,053.41/209,981.80
  6. Step 6: Final answer
    x = 182,112.45

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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.