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Finding the Fourth Proportional to 159,418.88, 220,024.32 and 121,621.76

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Solution

The fourth proportional to 159,418.88, 220,024.32 and 121,621.76 is: 167,858.07

Step by Step Solution

  1. Step 1: Write the proportion equation
    159,418.88 : 220,024.32 = 121,621.76 : x
  2. Step 2: Convert to fraction form
    159,418.88/220,024.32 = 121,621.76/x
  3. Step 3: Cross multiply
    159,418.88x = 220,024.32 × 121,621.76
  4. Step 4: Simplify right side
    159,418.88x = 26,759,745,041.20
  5. Step 5: Solve for x
    x = 26,759,745,041.20/159,418.88
  6. Step 6: Final answer
    x = 167,858.07

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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.