Home / 100,347.60-138,486.09-66,296.36

Finding the Fourth Proportional to 100,347.60, 138,486.09 and 66,296.36

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Solution

The fourth proportional to 100,347.60, 138,486.09 and 66,296.36 is: 91,493.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    100,347.60 : 138,486.09 = 66,296.36 : x
  2. Step 2: Convert to fraction form
    100,347.60/138,486.09 = 66,296.36/x
  3. Step 3: Cross multiply
    100,347.60x = 138,486.09 × 66,296.36
  4. Step 4: Simplify right side
    100,347.60x = 9,181,122,985.20
  5. Step 5: Solve for x
    x = 9,181,122,985.20/100,347.60
  6. Step 6: Final answer
    x = 91,493.20

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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.