Home / 209,602.16-289,165.52-129,005.36

Finding the Fourth Proportional to 209,602.16, 289,165.52 and 129,005.36

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Solution

The fourth proportional to 209,602.16, 289,165.52 and 129,005.36 is: 177,974.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    209,602.16 : 289,165.52 = 129,005.36 : x
  2. Step 2: Convert to fraction form
    209,602.16/289,165.52 = 129,005.36/x
  3. Step 3: Cross multiply
    209,602.16x = 289,165.52 × 129,005.36
  4. Step 4: Simplify right side
    209,602.16x = 37,303,902,007.19
  5. Step 5: Solve for x
    x = 37,303,902,007.19/209,602.16
  6. Step 6: Final answer
    x = 177,974.80

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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.