Home / 209,086.07-288,539.90-128,566.20

Finding the Fourth Proportional to 209,086.07, 288,539.90 and 128,566.20

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Solution

The fourth proportional to 209,086.07, 288,539.90 and 128,566.20 is: 177,422.05

Step by Step Solution

  1. Step 1: Write the proportion equation
    209,086.07 : 288,539.90 = 128,566.20 : x
  2. Step 2: Convert to fraction form
    209,086.07/288,539.90 = 128,566.20/x
  3. Step 3: Cross multiply
    209,086.07x = 288,539.90 × 128,566.20
  4. Step 4: Simplify right side
    209,086.07x = 37,096,477,848.55
  5. Step 5: Solve for x
    x = 37,096,477,848.55/209,086.07
  6. Step 6: Final answer
    x = 177,422.05

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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.