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Finding the Fourth Proportional to 209,173.65, 288,648.55 and 118,530.69

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Solution

The fourth proportional to 209,173.65, 288,648.55 and 118,530.69 is: 163,566.07

Step by Step Solution

  1. Step 1: Write the proportion equation
    209,173.65 : 288,648.55 = 118,530.69 : x
  2. Step 2: Convert to fraction form
    209,173.65/288,648.55 = 118,530.69/x
  3. Step 3: Cross multiply
    209,173.65x = 288,648.55 × 118,530.69
  4. Step 4: Simplify right side
    209,173.65x = 34,213,711,799.00
  5. Step 5: Solve for x
    x = 34,213,711,799.00/209,173.65
  6. Step 6: Final answer
    x = 163,566.07

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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.