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Finding the Fourth Proportional to 143,339.18, 197,810.43 and 78,811.14

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Solution

The fourth proportional to 143,339.18, 197,810.43 and 78,811.14 is: 108,760.67

Step by Step Solution

  1. Step 1: Write the proportion equation
    143,339.18 : 197,810.43 = 78,811.14 : x
  2. Step 2: Convert to fraction form
    143,339.18/197,810.43 = 78,811.14/x
  3. Step 3: Cross multiply
    143,339.18x = 197,810.43 × 78,811.14
  4. Step 4: Simplify right side
    143,339.18x = 15,589,665,492.19
  5. Step 5: Solve for x
    x = 15,589,665,492.19/143,339.18
  6. Step 6: Final answer
    x = 108,760.67

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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.