Home / 209,076.79-288,527.12-128,556.91

Finding the Fourth Proportional to 209,076.79, 288,527.12 and 128,556.91

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Solution

The fourth proportional to 209,076.79, 288,527.12 and 128,556.91 is: 177,409.24

Step by Step Solution

  1. Step 1: Write the proportion equation
    209,076.79 : 288,527.12 = 128,556.91 : x
  2. Step 2: Convert to fraction form
    209,076.79/288,527.12 = 128,556.91/x
  3. Step 3: Cross multiply
    209,076.79x = 288,527.12 × 128,556.91
  4. Step 4: Simplify right side
    209,076.79x = 37,092,154,998.40
  5. Step 5: Solve for x
    x = 37,092,154,998.40/209,076.79
  6. Step 6: Final answer
    x = 177,409.24

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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.