Home / 120,453.40-166,365.66-113,455

Finding the Fourth Proportional to 120,453.40, 166,365.66 and 113,455

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Solution

The fourth proportional to 120,453.40, 166,365.66 and 113,455 is: 156,699.74

Step by Step Solution

  1. Step 1: Write the proportion equation
    120,453.40 : 166,365.66 = 113,455 : x
  2. Step 2: Convert to fraction form
    120,453.40/166,365.66 = 113,455/x
  3. Step 3: Cross multiply
    120,453.40x = 166,365.66 × 113,455
  4. Step 4: Simplify right side
    120,453.40x = 18,875,015,955.30
  5. Step 5: Solve for x
    x = 18,875,015,955.30/120,453.40
  6. Step 6: Final answer
    x = 156,699.74

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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.