Home / 100,625.21-138,716.45-70,316.46

Finding the Fourth Proportional to 100,625.21, 138,716.45 and 70,316.46

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Solution

The fourth proportional to 100,625.21, 138,716.45 and 70,316.46 is: 96,934.45

Step by Step Solution

  1. Step 1: Write the proportion equation
    100,625.21 : 138,716.45 = 70,316.46 : x
  2. Step 2: Convert to fraction form
    100,625.21/138,716.45 = 70,316.46/x
  3. Step 3: Cross multiply
    100,625.21x = 138,716.45 × 70,316.46
  4. Step 4: Simplify right side
    100,625.21x = 9,754,049,014.18
  5. Step 5: Solve for x
    x = 9,754,049,014.18/100,625.21
  6. Step 6: Final answer
    x = 96,934.45

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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.