Home / 81,077.51-121,622.75-28,498.79

Finding the Fourth Proportional to 81,077.51, 121,622.75 and 28,498.79

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Solution

The fourth proportional to 81,077.51, 121,622.75 and 28,498.79 is: 42,750.46

Step by Step Solution

  1. Step 1: Write the proportion equation
    81,077.51 : 121,622.75 = 28,498.79 : x
  2. Step 2: Convert to fraction form
    81,077.51/121,622.75 = 28,498.79/x
  3. Step 3: Cross multiply
    81,077.51x = 121,622.75 × 28,498.79
  4. Step 4: Simplify right side
    81,077.51x = 3,466,100,460.86
  5. Step 5: Solve for x
    x = 3,466,100,460.86/81,077.51
  6. Step 6: Final answer
    x = 42,750.46

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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.