Home / 131,406.39-181,340.82-71,790.39

Finding the Fourth Proportional to 131,406.39, 181,340.82 and 71,790.39

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Solution

The fourth proportional to 131,406.39, 181,340.82 and 71,790.39 is: 99,070.74

Step by Step Solution

  1. Step 1: Write the proportion equation
    131,406.39 : 181,340.82 = 71,790.39 : x
  2. Step 2: Convert to fraction form
    131,406.39/181,340.82 = 71,790.39/x
  3. Step 3: Cross multiply
    131,406.39x = 181,340.82 × 71,790.39
  4. Step 4: Simplify right side
    131,406.39x = 13,018,528,190.72
  5. Step 5: Solve for x
    x = 13,018,528,190.72/131,406.39
  6. Step 6: Final answer
    x = 99,070.74

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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.