Home / 209,913.80-314,870.70-121,121.60

Finding the Fourth Proportional to 209,913.80, 314,870.70 and 121,121.60

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Solution

The fourth proportional to 209,913.80, 314,870.70 and 121,121.60 is: 181,682.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    209,913.80 : 314,870.70 = 121,121.60 : x
  2. Step 2: Convert to fraction form
    209,913.80/314,870.70 = 121,121.60/x
  3. Step 3: Cross multiply
    209,913.80x = 314,870.70 × 121,121.60
  4. Step 4: Simplify right side
    209,913.80x = 38,137,642,977.12
  5. Step 5: Solve for x
    x = 38,137,642,977.12/209,913.80
  6. Step 6: Final answer
    x = 181,682.40

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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.