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Finding the Fourth Proportional to 209,368.80, 288,805.83 and 131,720.94

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Solution

The fourth proportional to 209,368.80, 288,805.83 and 131,720.94 is: 181,697.44

Step by Step Solution

  1. Step 1: Write the proportion equation
    209,368.80 : 288,805.83 = 131,720.94 : x
  2. Step 2: Convert to fraction form
    209,368.80/288,805.83 = 131,720.94/x
  3. Step 3: Cross multiply
    209,368.80x = 288,805.83 × 131,720.94
  4. Step 4: Simplify right side
    209,368.80x = 38,041,775,405.08
  5. Step 5: Solve for x
    x = 38,041,775,405.08/209,368.80
  6. Step 6: Final answer
    x = 181,697.44

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.