Home / 143,718.93-198,332.31-78,307.41

Finding the Fourth Proportional to 143,718.93, 198,332.31 and 78,307.41

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Solution

The fourth proportional to 143,718.93, 198,332.31 and 78,307.41 is: 108,064.33

Step by Step Solution

  1. Step 1: Write the proportion equation
    143,718.93 : 198,332.31 = 78,307.41 : x
  2. Step 2: Convert to fraction form
    143,718.93/198,332.31 = 78,307.41/x
  3. Step 3: Cross multiply
    143,718.93x = 198,332.31 × 78,307.41
  4. Step 4: Simplify right side
    143,718.93x = 15,530,889,515.42
  5. Step 5: Solve for x
    x = 15,530,889,515.42/143,718.93
  6. Step 6: Final answer
    x = 108,064.33

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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.