Home / 81,209.07-121,801.27-28,606.25

Finding the Fourth Proportional to 81,209.07, 121,801.27 and 28,606.25

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Solution

The fourth proportional to 81,209.07, 121,801.27 and 28,606.25 is: 42,905.03

Step by Step Solution

  1. Step 1: Write the proportion equation
    81,209.07 : 121,801.27 = 28,606.25 : x
  2. Step 2: Convert to fraction form
    81,209.07/121,801.27 = 28,606.25/x
  3. Step 3: Cross multiply
    81,209.07x = 121,801.27 × 28,606.25
  4. Step 4: Simplify right side
    81,209.07x = 3,484,277,579.94
  5. Step 5: Solve for x
    x = 3,484,277,579.94/81,209.07
  6. Step 6: Final answer
    x = 42,905.03

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.