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Finding the Fourth Proportional to 212,012.94, 292,581.27 and 121,368.54

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Solution

The fourth proportional to 212,012.94, 292,581.27 and 121,368.54 is: 167,490.54

Step by Step Solution

  1. Step 1: Write the proportion equation
    212,012.94 : 292,581.27 = 121,368.54 : x
  2. Step 2: Convert to fraction form
    212,012.94/292,581.27 = 121,368.54/x
  3. Step 3: Cross multiply
    212,012.94x = 292,581.27 × 121,368.54
  4. Step 4: Simplify right side
    212,012.94x = 35,510,161,571.25
  5. Step 5: Solve for x
    x = 35,510,161,571.25/212,012.94
  6. Step 6: Final answer
    x = 167,490.54

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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.