Home / 100,210.10-138,255.59-57,158.66

Finding the Fourth Proportional to 100,210.10, 138,255.59 and 57,158.66

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Solution

The fourth proportional to 100,210.10, 138,255.59 and 57,158.66 is: 78,859.37

Step by Step Solution

  1. Step 1: Write the proportion equation
    100,210.10 : 138,255.59 = 57,158.66 : x
  2. Step 2: Convert to fraction form
    100,210.10/138,255.59 = 57,158.66/x
  3. Step 3: Cross multiply
    100,210.10x = 138,255.59 × 57,158.66
  4. Step 4: Simplify right side
    100,210.10x = 7,902,504,750.45
  5. Step 5: Solve for x
    x = 7,902,504,750.45/100,210.10
  6. Step 6: Final answer
    x = 78,859.37

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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.