Home / 131,833.06-181,898.04-78,108.78

Finding the Fourth Proportional to 131,833.06, 181,898.04 and 78,108.78

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Solution

The fourth proportional to 131,833.06, 181,898.04 and 78,108.78 is: 107,771.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    131,833.06 : 181,898.04 = 78,108.78 : x
  2. Step 2: Convert to fraction form
    131,833.06/181,898.04 = 78,108.78/x
  3. Step 3: Cross multiply
    131,833.06x = 181,898.04 × 78,108.78
  4. Step 4: Simplify right side
    131,833.06x = 14,207,833,988.79
  5. Step 5: Solve for x
    x = 14,207,833,988.79/131,833.06
  6. Step 6: Final answer
    x = 107,771.40

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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.