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Finding the Fourth Proportional to 209,940.95, 289,689.29 and 123,903.53

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Solution

The fourth proportional to 209,940.95, 289,689.29 and 123,903.53 is: 170,969.62

Step by Step Solution

  1. Step 1: Write the proportion equation
    209,940.95 : 289,689.29 = 123,903.53 : x
  2. Step 2: Convert to fraction form
    209,940.95/289,689.29 = 123,903.53/x
  3. Step 3: Cross multiply
    209,940.95x = 289,689.29 × 123,903.53
  4. Step 4: Simplify right side
    209,940.95x = 35,893,523,566.23
  5. Step 5: Solve for x
    x = 35,893,523,566.23/209,940.95
  6. Step 6: Final answer
    x = 170,969.62

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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.