Home / 129,427.47-193,878.77-66,966.75

Finding the Fourth Proportional to 129,427.47, 193,878.77 and 66,966.75

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Solution

The fourth proportional to 129,427.47, 193,878.77 and 66,966.75 is: 100,314.34

Step by Step Solution

  1. Step 1: Write the proportion equation
    129,427.47 : 193,878.77 = 66,966.75 : x
  2. Step 2: Convert to fraction form
    129,427.47/193,878.77 = 66,966.75/x
  3. Step 3: Cross multiply
    129,427.47x = 193,878.77 × 66,966.75
  4. Step 4: Simplify right side
    129,427.47x = 12,983,430,786.06
  5. Step 5: Solve for x
    x = 12,983,430,786.06/129,427.47
  6. Step 6: Final answer
    x = 100,314.34

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.