Home / 143,378.04-197,856.06-79,711.20

Finding the Fourth Proportional to 143,378.04, 197,856.06 and 79,711.20

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Solution

The fourth proportional to 143,378.04, 197,856.06 and 79,711.20 is: 109,998.32

Step by Step Solution

  1. Step 1: Write the proportion equation
    143,378.04 : 197,856.06 = 79,711.20 : x
  2. Step 2: Convert to fraction form
    143,378.04/197,856.06 = 79,711.20/x
  3. Step 3: Cross multiply
    143,378.04x = 197,856.06 × 79,711.20
  4. Step 4: Simplify right side
    143,378.04x = 15,771,343,969.87
  5. Step 5: Solve for x
    x = 15,771,343,969.87/143,378.04
  6. Step 6: Final answer
    x = 109,998.32

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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.