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Finding the Fourth Proportional to 154,697.31, 213,495.35 and 86,713.20

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Solution

The fourth proportional to 154,697.31, 213,495.35 and 86,713.20 is: 119,671.54

Step by Step Solution

  1. Step 1: Write the proportion equation
    154,697.31 : 213,495.35 = 86,713.20 : x
  2. Step 2: Convert to fraction form
    154,697.31/213,495.35 = 86,713.20/x
  3. Step 3: Cross multiply
    154,697.31x = 213,495.35 × 86,713.20
  4. Step 4: Simplify right side
    154,697.31x = 18,512,864,550.05
  5. Step 5: Solve for x
    x = 18,512,864,550.05/154,697.31
  6. Step 6: Final answer
    x = 119,671.54

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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.