Home / 66,428.40-91,671.35-36,213.28

Finding the Fourth Proportional to 66,428.40, 91,671.35 and 36,213.28

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Solution

The fourth proportional to 66,428.40, 91,671.35 and 36,213.28 is: 49,974.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    66,428.40 : 91,671.35 = 36,213.28 : x
  2. Step 2: Convert to fraction form
    66,428.40/91,671.35 = 36,213.28/x
  3. Step 3: Cross multiply
    66,428.40x = 91,671.35 × 36,213.28
  4. Step 4: Simplify right side
    66,428.40x = 3,319,719,855.28
  5. Step 5: Solve for x
    x = 3,319,719,855.28/66,428.40
  6. Step 6: Final answer
    x = 49,974.40

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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.