Home / 131,815.78-181,904.81-71,385.02

Finding the Fourth Proportional to 131,815.78, 181,904.81 and 71,385.02

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Solution

The fourth proportional to 131,815.78, 181,904.81 and 71,385.02 is: 98,510.81

Step by Step Solution

  1. Step 1: Write the proportion equation
    131,815.78 : 181,904.81 = 71,385.02 : x
  2. Step 2: Convert to fraction form
    131,815.78/181,904.81 = 71,385.02/x
  3. Step 3: Cross multiply
    131,815.78x = 181,904.81 × 71,385.02
  4. Step 4: Simplify right side
    131,815.78x = 12,985,279,029.56
  5. Step 5: Solve for x
    x = 12,985,279,029.56/131,815.78
  6. Step 6: Final answer
    x = 98,510.81

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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.