Home / 189,980.06-285,081.98-70,121.39

Finding the Fourth Proportional to 189,980.06, 285,081.98 and 70,121.39

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Solution

The fourth proportional to 189,980.06, 285,081.98 and 70,121.39 is: 105,223.38

Step by Step Solution

  1. Step 1: Write the proportion equation
    189,980.06 : 285,081.98 = 70,121.39 : x
  2. Step 2: Convert to fraction form
    189,980.06/285,081.98 = 70,121.39/x
  3. Step 3: Cross multiply
    189,980.06x = 285,081.98 × 70,121.39
  4. Step 4: Simplify right side
    189,980.06x = 19,990,344,701.55
  5. Step 5: Solve for x
    x = 19,990,344,701.55/189,980.06
  6. Step 6: Final answer
    x = 105,223.38

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.