Home / 100,203.90-138,214.80-64,439.16

Finding the Fourth Proportional to 100,203.90, 138,214.80 and 64,439.16

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Solution

The fourth proportional to 100,203.90, 138,214.80 and 64,439.16 is: 88,883.22

Step by Step Solution

  1. Step 1: Write the proportion equation
    100,203.90 : 138,214.80 = 64,439.16 : x
  2. Step 2: Convert to fraction form
    100,203.90/138,214.80 = 64,439.16/x
  3. Step 3: Cross multiply
    100,203.90x = 138,214.80 × 64,439.16
  4. Step 4: Simplify right side
    100,203.90x = 8,906,445,611.57
  5. Step 5: Solve for x
    x = 8,906,445,611.57/100,203.90
  6. Step 6: Final answer
    x = 88,883.22

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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.