Home / 131,790-181,869.93-71,360.63

Finding the Fourth Proportional to 131,790, 181,869.93 and 71,360.63

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Solution

The fourth proportional to 131,790, 181,869.93 and 71,360.63 is: 98,477.52

Step by Step Solution

  1. Step 1: Write the proportion equation
    131,790 : 181,869.93 = 71,360.63 : x
  2. Step 2: Convert to fraction form
    131,790/181,869.93 = 71,360.63/x
  3. Step 3: Cross multiply
    131,790x = 181,869.93 × 71,360.63
  4. Step 4: Simplify right side
    131,790x = 12,978,352,782.86
  5. Step 5: Solve for x
    x = 12,978,352,782.86/131,790
  6. Step 6: Final answer
    x = 98,477.52

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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.