Home / 212,120.38-292,642.90-121,427.65

Finding the Fourth Proportional to 212,120.38, 292,642.90 and 121,427.65

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Solution

The fourth proportional to 212,120.38, 292,642.90 and 121,427.65 is: 167,522.51

Step by Step Solution

  1. Step 1: Write the proportion equation
    212,120.38 : 292,642.90 = 121,427.65 : x
  2. Step 2: Convert to fraction form
    212,120.38/292,642.90 = 121,427.65/x
  3. Step 3: Cross multiply
    212,120.38x = 292,642.90 × 121,427.65
  4. Step 4: Simplify right side
    212,120.38x = 35,534,938,601.01
  5. Step 5: Solve for x
    x = 35,534,938,601.01/212,120.38
  6. Step 6: Final answer
    x = 167,522.51

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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.