Home / 100,670.09-138,900.02-74,486.22

Finding the Fourth Proportional to 100,670.09, 138,900.02 and 74,486.22

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Solution

The fourth proportional to 100,670.09, 138,900.02 and 74,486.22 is: 102,772.71

Step by Step Solution

  1. Step 1: Write the proportion equation
    100,670.09 : 138,900.02 = 74,486.22 : x
  2. Step 2: Convert to fraction form
    100,670.09/138,900.02 = 74,486.22/x
  3. Step 3: Cross multiply
    100,670.09x = 138,900.02 × 74,486.22
  4. Step 4: Simplify right side
    100,670.09x = 10,346,137,075.29
  5. Step 5: Solve for x
    x = 10,346,137,075.29/100,670.09
  6. Step 6: Final answer
    x = 102,772.71

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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.