Home / 251,455.12-347,017.32-138,288.40

Finding the Fourth Proportional to 251,455.12, 347,017.32 and 138,288.40

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Solution

The fourth proportional to 251,455.12, 347,017.32 and 138,288.40 is: 190,843.08

Step by Step Solution

  1. Step 1: Write the proportion equation
    251,455.12 : 347,017.32 = 138,288.40 : x
  2. Step 2: Convert to fraction form
    251,455.12/347,017.32 = 138,288.40/x
  3. Step 3: Cross multiply
    251,455.12x = 347,017.32 × 138,288.40
  4. Step 4: Simplify right side
    251,455.12x = 47,988,469,955.09
  5. Step 5: Solve for x
    x = 47,988,469,955.09/251,455.12
  6. Step 6: Final answer
    x = 190,843.08

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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.