Home / 85,406.15-117,860.49-47,680.40

Finding the Fourth Proportional to 85,406.15, 117,860.49 and 47,680.40

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Solution

The fourth proportional to 85,406.15, 117,860.49 and 47,680.40 is: 65,798.95

Step by Step Solution

  1. Step 1: Write the proportion equation
    85,406.15 : 117,860.49 = 47,680.40 : x
  2. Step 2: Convert to fraction form
    85,406.15/117,860.49 = 47,680.40/x
  3. Step 3: Cross multiply
    85,406.15x = 117,860.49 × 47,680.40
  4. Step 4: Simplify right side
    85,406.15x = 5,619,635,307.40
  5. Step 5: Solve for x
    x = 5,619,635,307.40/85,406.15
  6. Step 6: Final answer
    x = 65,798.95

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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.