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Finding the Fourth Proportional to 143,583.88, 198,145.80 and 79,920.32

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Solution

The fourth proportional to 143,583.88, 198,145.80 and 79,920.32 is: 110,290.07

Step by Step Solution

  1. Step 1: Write the proportion equation
    143,583.88 : 198,145.80 = 79,920.32 : x
  2. Step 2: Convert to fraction form
    143,583.88/198,145.80 = 79,920.32/x
  3. Step 3: Cross multiply
    143,583.88x = 198,145.80 × 79,920.32
  4. Step 4: Simplify right side
    143,583.88x = 15,835,875,742.66
  5. Step 5: Solve for x
    x = 15,835,875,742.66/143,583.88
  6. Step 6: Final answer
    x = 110,290.07

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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.