Home / 100,109.32-138,090.83-66,117.87

Finding the Fourth Proportional to 100,109.32, 138,090.83 and 66,117.87

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Solution

The fourth proportional to 100,109.32, 138,090.83 and 66,117.87 is: 91,203.01

Step by Step Solution

  1. Step 1: Write the proportion equation
    100,109.32 : 138,090.83 = 66,117.87 : x
  2. Step 2: Convert to fraction form
    100,109.32/138,090.83 = 66,117.87/x
  3. Step 3: Cross multiply
    100,109.32x = 138,090.83 × 66,117.87
  4. Step 4: Simplify right side
    100,109.32x = 9,130,271,215.54
  5. Step 5: Solve for x
    x = 9,130,271,215.54/100,109.32
  6. Step 6: Final answer
    x = 91,203.01

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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.