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Finding the Fourth Proportional to 133,688, 200,615.28 and 121,230.64

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Solution

The fourth proportional to 133,688, 200,615.28 and 121,230.64 is: 181,921.48

Step by Step Solution

  1. Step 1: Write the proportion equation
    133,688 : 200,615.28 = 121,230.64 : x
  2. Step 2: Convert to fraction form
    133,688/200,615.28 = 121,230.64/x
  3. Step 3: Cross multiply
    133,688x = 200,615.28 × 121,230.64
  4. Step 4: Simplify right side
    133,688x = 24,320,718,788.18
  5. Step 5: Solve for x
    x = 24,320,718,788.18/133,688
  6. Step 6: Final answer
    x = 181,921.48

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.