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Finding the Fourth Proportional to 159,411.60, 220,012.20 and 121,108.32

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Solution

The fourth proportional to 159,411.60, 220,012.20 and 121,108.32 is: 167,147.86

Step by Step Solution

  1. Step 1: Write the proportion equation
    159,411.60 : 220,012.20 = 121,108.32 : x
  2. Step 2: Convert to fraction form
    159,411.60/220,012.20 = 121,108.32/x
  3. Step 3: Cross multiply
    159,411.60x = 220,012.20 × 121,108.32
  4. Step 4: Simplify right side
    159,411.60x = 26,645,307,921.50
  5. Step 5: Solve for x
    x = 26,645,307,921.50/159,411.60
  6. Step 6: Final answer
    x = 167,147.86

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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.