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Finding the Fourth Proportional to 209,398.74, 288,968.85 and 118,772.34

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Solution

The fourth proportional to 209,398.74, 288,968.85 and 118,772.34 is: 163,905.03

Step by Step Solution

  1. Step 1: Write the proportion equation
    209,398.74 : 288,968.85 = 118,772.34 : x
  2. Step 2: Convert to fraction form
    209,398.74/288,968.85 = 118,772.34/x
  3. Step 3: Cross multiply
    209,398.74x = 288,968.85 × 118,772.34
  4. Step 4: Simplify right side
    209,398.74x = 34,321,506,501.61
  5. Step 5: Solve for x
    x = 34,321,506,501.61/209,398.74
  6. Step 6: Final answer
    x = 163,905.03

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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.