Home / 143,621.51-215,339.72-68,739.84

Finding the Fourth Proportional to 143,621.51, 215,339.72 and 68,739.84

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Solution

The fourth proportional to 143,621.51, 215,339.72 and 68,739.84 is: 103,065.47

Step by Step Solution

  1. Step 1: Write the proportion equation
    143,621.51 : 215,339.72 = 68,739.84 : x
  2. Step 2: Convert to fraction form
    143,621.51/215,339.72 = 68,739.84/x
  3. Step 3: Cross multiply
    143,621.51x = 215,339.72 × 68,739.84
  4. Step 4: Simplify right side
    143,621.51x = 14,802,417,554.75
  5. Step 5: Solve for x
    x = 14,802,417,554.75/143,621.51
  6. Step 6: Final answer
    x = 103,065.47

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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.