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Finding the Fourth Proportional to 121,019.70, 181,529.55 and 61,835.70

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Solution

The fourth proportional to 121,019.70, 181,529.55 and 61,835.70 is: 92,753.55

Step by Step Solution

  1. Step 1: Write the proportion equation
    121,019.70 : 181,529.55 = 61,835.70 : x
  2. Step 2: Convert to fraction form
    121,019.70/181,529.55 = 61,835.70/x
  3. Step 3: Cross multiply
    121,019.70x = 181,529.55 × 61,835.70
  4. Step 4: Simplify right side
    121,019.70x = 11,225,006,794.94
  5. Step 5: Solve for x
    x = 11,225,006,794.94/121,019.70
  6. Step 6: Final answer
    x = 92,753.55

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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.