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Finding the Fourth Proportional to 209,387.40, 289,005.93 and 118,796.39

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Solution

The fourth proportional to 209,387.40, 289,005.93 and 118,796.39 is: 163,968.13

Step by Step Solution

  1. Step 1: Write the proportion equation
    209,387.40 : 289,005.93 = 118,796.39 : x
  2. Step 2: Convert to fraction form
    209,387.40/289,005.93 = 118,796.39/x
  3. Step 3: Cross multiply
    209,387.40x = 289,005.93 × 118,796.39
  4. Step 4: Simplify right side
    209,387.40x = 34,332,861,172.59
  5. Step 5: Solve for x
    x = 34,332,861,172.59/209,387.40
  6. Step 6: Final answer
    x = 163,968.13

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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.