Home / 209,347.58-288,905.71-128,822.24

Finding the Fourth Proportional to 209,347.58, 288,905.71 and 128,822.24

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Solution

The fourth proportional to 209,347.58, 288,905.71 and 128,822.24 is: 177,778.41

Step by Step Solution

  1. Step 1: Write the proportion equation
    209,347.58 : 288,905.71 = 128,822.24 : x
  2. Step 2: Convert to fraction form
    209,347.58/288,905.71 = 128,822.24/x
  3. Step 3: Cross multiply
    209,347.58x = 288,905.71 × 128,822.24
  4. Step 4: Simplify right side
    209,347.58x = 37,217,481,111.20
  5. Step 5: Solve for x
    x = 37,217,481,111.20/209,347.58
  6. Step 6: Final answer
    x = 177,778.41

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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.