Home / 317,928.40-476,890.71-81,270.70

Finding the Fourth Proportional to 317,928.40, 476,890.71 and 81,270.70

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Solution

The fourth proportional to 317,928.40, 476,890.71 and 81,270.70 is: 121,905.57

Step by Step Solution

  1. Step 1: Write the proportion equation
    317,928.40 : 476,890.71 = 81,270.70 : x
  2. Step 2: Convert to fraction form
    317,928.40/476,890.71 = 81,270.70/x
  3. Step 3: Cross multiply
    317,928.40x = 476,890.71 × 81,270.70
  4. Step 4: Simplify right side
    317,928.40x = 38,757,241,825.20
  5. Step 5: Solve for x
    x = 38,757,241,825.20/317,928.40
  6. Step 6: Final answer
    x = 121,905.57

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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.