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Finding the Fourth Proportional to 212,215.68, 292,859.12 and 115,419.52

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Solution

The fourth proportional to 212,215.68, 292,859.12 and 115,419.52 is: 159,279.74

Step by Step Solution

  1. Step 1: Write the proportion equation
    212,215.68 : 292,859.12 = 115,419.52 : x
  2. Step 2: Convert to fraction form
    212,215.68/292,859.12 = 115,419.52/x
  3. Step 3: Cross multiply
    212,215.68x = 292,859.12 × 115,419.52
  4. Step 4: Simplify right side
    212,215.68x = 33,801,659,058.02
  5. Step 5: Solve for x
    x = 33,801,659,058.02/212,215.68
  6. Step 6: Final answer
    x = 159,279.74

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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.