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Finding the Fourth Proportional to 209,387.15, 289,005.59 and 118,796.15

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Solution

The fourth proportional to 209,387.15, 289,005.59 and 118,796.15 is: 163,967.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    209,387.15 : 289,005.59 = 118,796.15 : x
  2. Step 2: Convert to fraction form
    209,387.15/289,005.59 = 118,796.15/x
  3. Step 3: Cross multiply
    209,387.15x = 289,005.59 × 118,796.15
  4. Step 4: Simplify right side
    209,387.15x = 34,332,750,272.44
  5. Step 5: Solve for x
    x = 34,332,750,272.44/209,387.15
  6. Step 6: Final answer
    x = 163,967.80

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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.