Home / 209,114.19-288,429.80-128,587.23

Finding the Fourth Proportional to 209,114.19, 288,429.80 and 128,587.23

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Solution

The fourth proportional to 209,114.19, 288,429.80 and 128,587.23 is: 177,359.50

Step by Step Solution

  1. Step 1: Write the proportion equation
    209,114.19 : 288,429.80 = 128,587.23 : x
  2. Step 2: Convert to fraction form
    209,114.19/288,429.80 = 128,587.23/x
  3. Step 3: Cross multiply
    209,114.19x = 288,429.80 × 128,587.23
  4. Step 4: Simplify right side
    209,114.19x = 37,088,388,388.52
  5. Step 5: Solve for x
    x = 37,088,388,388.52/209,114.19
  6. Step 6: Final answer
    x = 177,359.50

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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.