Home / 251,917.12-347,643.84-138,739.20

Finding the Fourth Proportional to 251,917.12, 347,643.84 and 138,739.20

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Solution

The fourth proportional to 251,917.12, 347,643.84 and 138,739.20 is: 191,459.11

Step by Step Solution

  1. Step 1: Write the proportion equation
    251,917.12 : 347,643.84 = 138,739.20 : x
  2. Step 2: Convert to fraction form
    251,917.12/347,643.84 = 138,739.20/x
  3. Step 3: Cross multiply
    251,917.12x = 347,643.84 × 138,739.20
  4. Step 4: Simplify right side
    251,917.12x = 48,231,828,246.53
  5. Step 5: Solve for x
    x = 48,231,828,246.53/251,917.12
  6. Step 6: Final answer
    x = 191,459.11

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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.