Home / 100,387.02-138,538.05-55,066.68

Finding the Fourth Proportional to 100,387.02, 138,538.05 and 55,066.68

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Solution

The fourth proportional to 100,387.02, 138,538.05 and 55,066.68 is: 75,994.19

Step by Step Solution

  1. Step 1: Write the proportion equation
    100,387.02 : 138,538.05 = 55,066.68 : x
  2. Step 2: Convert to fraction form
    100,387.02/138,538.05 = 55,066.68/x
  3. Step 3: Cross multiply
    100,387.02x = 138,538.05 × 55,066.68
  4. Step 4: Simplify right side
    100,387.02x = 7,628,830,467.17
  5. Step 5: Solve for x
    x = 7,628,830,467.17/100,387.02
  6. Step 6: Final answer
    x = 75,994.19

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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.