Home / 258,742.20-387,998.10-118,543.80

Finding the Fourth Proportional to 258,742.20, 387,998.10 and 118,543.80

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Solution

The fourth proportional to 258,742.20, 387,998.10 and 118,543.80 is: 177,762.92

Step by Step Solution

  1. Step 1: Write the proportion equation
    258,742.20 : 387,998.10 = 118,543.80 : x
  2. Step 2: Convert to fraction form
    258,742.20/387,998.10 = 118,543.80/x
  3. Step 3: Cross multiply
    258,742.20x = 387,998.10 × 118,543.80
  4. Step 4: Simplify right side
    258,742.20x = 45,994,769,166.78
  5. Step 5: Solve for x
    x = 45,994,769,166.78/258,742.20
  6. Step 6: Final answer
    x = 177,762.92

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.