Home / 144,643.05-216,997.29-78,081.75

Finding the Fourth Proportional to 144,643.05, 216,997.29 and 78,081.75

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Solution

The fourth proportional to 144,643.05, 216,997.29 and 78,081.75 is: 117,140.29

Step by Step Solution

  1. Step 1: Write the proportion equation
    144,643.05 : 216,997.29 = 78,081.75 : x
  2. Step 2: Convert to fraction form
    144,643.05/216,997.29 = 78,081.75/x
  3. Step 3: Cross multiply
    144,643.05x = 216,997.29 × 78,081.75
  4. Step 4: Simplify right side
    144,643.05x = 16,943,528,148.46
  5. Step 5: Solve for x
    x = 16,943,528,148.46/144,643.05
  6. Step 6: Final answer
    x = 117,140.29

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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.