Home / 90,742.72-125,216.40-84,055.36

Finding the Fourth Proportional to 90,742.72, 125,216.40 and 84,055.36

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Solution

The fourth proportional to 90,742.72, 125,216.40 and 84,055.36 is: 115,988.47

Step by Step Solution

  1. Step 1: Write the proportion equation
    90,742.72 : 125,216.40 = 84,055.36 : x
  2. Step 2: Convert to fraction form
    90,742.72/125,216.40 = 84,055.36/x
  3. Step 3: Cross multiply
    90,742.72x = 125,216.40 × 84,055.36
  4. Step 4: Simplify right side
    90,742.72x = 10,525,109,579.90
  5. Step 5: Solve for x
    x = 10,525,109,579.90/90,742.72
  6. Step 6: Final answer
    x = 115,988.47

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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.