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Finding the Fourth Proportional to 143,805.16, 198,503.22 and 87,215.32

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Solution

The fourth proportional to 143,805.16, 198,503.22 and 87,215.32 is: 120,388.74

Step by Step Solution

  1. Step 1: Write the proportion equation
    143,805.16 : 198,503.22 = 87,215.32 : x
  2. Step 2: Convert to fraction form
    143,805.16/198,503.22 = 87,215.32/x
  3. Step 3: Cross multiply
    143,805.16x = 198,503.22 × 87,215.32
  4. Step 4: Simplify right side
    143,805.16x = 17,312,521,853.33
  5. Step 5: Solve for x
    x = 17,312,521,853.33/143,805.16
  6. Step 6: Final answer
    x = 120,388.74

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These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.