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Finding the Fourth Proportional to 113,493.40, 169,980.90 and 66,837.40

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Solution

The fourth proportional to 113,493.40, 169,980.90 and 66,837.40 is: 100,103.45

Step by Step Solution

  1. Step 1: Write the proportion equation
    113,493.40 : 169,980.90 = 66,837.40 : x
  2. Step 2: Convert to fraction form
    113,493.40/169,980.90 = 66,837.40/x
  3. Step 3: Cross multiply
    113,493.40x = 169,980.90 × 66,837.40
  4. Step 4: Simplify right side
    113,493.40x = 11,361,081,405.66
  5. Step 5: Solve for x
    x = 11,361,081,405.66/113,493.40
  6. Step 6: Final answer
    x = 100,103.45

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.