Home / 131,405.63-181,339.79-71,789.63

Finding the Fourth Proportional to 131,405.63, 181,339.79 and 71,789.63

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Solution

The fourth proportional to 131,405.63, 181,339.79 and 71,789.63 is: 99,069.69

Step by Step Solution

  1. Step 1: Write the proportion equation
    131,405.63 : 181,339.79 = 71,789.63 : x
  2. Step 2: Convert to fraction form
    131,405.63/181,339.79 = 71,789.63/x
  3. Step 3: Cross multiply
    131,405.63x = 181,339.79 × 71,789.63
  4. Step 4: Simplify right side
    131,405.63x = 13,018,315,162.73
  5. Step 5: Solve for x
    x = 13,018,315,162.73/131,405.63
  6. Step 6: Final answer
    x = 99,069.69

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1.5x scale

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.