Home / 212,128.60-292,738.08-121,486

Finding the Fourth Proportional to 212,128.60, 292,738.08 and 121,486

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Solution

The fourth proportional to 212,128.60, 292,738.08 and 121,486 is: 167,651.03

Step by Step Solution

  1. Step 1: Write the proportion equation
    212,128.60 : 292,738.08 = 121,486 : x
  2. Step 2: Convert to fraction form
    212,128.60/292,738.08 = 121,486/x
  3. Step 3: Cross multiply
    212,128.60x = 292,738.08 × 121,486
  4. Step 4: Simplify right side
    212,128.60x = 35,563,578,386.88
  5. Step 5: Solve for x
    x = 35,563,578,386.88/212,128.60
  6. Step 6: Final answer
    x = 167,651.03

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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.