Home / 209,341.48-288,859.62-128,782.12

Finding the Fourth Proportional to 209,341.48, 288,859.62 and 128,782.12

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Solution

The fourth proportional to 209,341.48, 288,859.62 and 128,782.12 is: 177,699.87

Step by Step Solution

  1. Step 1: Write the proportion equation
    209,341.48 : 288,859.62 = 128,782.12 : x
  2. Step 2: Convert to fraction form
    209,341.48/288,859.62 = 128,782.12/x
  3. Step 3: Cross multiply
    209,341.48x = 288,859.62 × 128,782.12
  4. Step 4: Simplify right side
    209,341.48x = 37,199,954,245.99
  5. Step 5: Solve for x
    x = 37,199,954,245.99/209,341.48
  6. Step 6: Final answer
    x = 177,699.87

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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.