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Finding the Fourth Proportional to 212,153.76, 292,747.64 and 121,504.32

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Solution

The fourth proportional to 212,153.76, 292,747.64 and 121,504.32 is: 167,661.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    212,153.76 : 292,747.64 = 121,504.32 : x
  2. Step 2: Convert to fraction form
    212,153.76/292,747.64 = 121,504.32/x
  3. Step 3: Cross multiply
    212,153.76x = 292,747.64 × 121,504.32
  4. Step 4: Simplify right side
    212,153.76x = 35,570,102,929.80
  5. Step 5: Solve for x
    x = 35,570,102,929.80/212,153.76
  6. Step 6: Final answer
    x = 167,661.90

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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.