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Finding the Fourth Proportional to 190,077.92, 285,485.93 and 139,960.11

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Solution

The fourth proportional to 190,077.92, 285,485.93 and 139,960.11 is: 210,211.91

Step by Step Solution

  1. Step 1: Write the proportion equation
    190,077.92 : 285,485.93 = 139,960.11 : x
  2. Step 2: Convert to fraction form
    190,077.92/285,485.93 = 139,960.11/x
  3. Step 3: Cross multiply
    190,077.92x = 285,485.93 × 139,960.11
  4. Step 4: Simplify right side
    190,077.92x = 39,956,642,166.25
  5. Step 5: Solve for x
    x = 39,956,642,166.25/190,077.92
  6. Step 6: Final answer
    x = 210,211.91

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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.