Home / 85,608.18-118,139.58-47,880

Finding the Fourth Proportional to 85,608.18, 118,139.58 and 47,880

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Solution

The fourth proportional to 85,608.18, 118,139.58 and 47,880 is: 66,074.56

Step by Step Solution

  1. Step 1: Write the proportion equation
    85,608.18 : 118,139.58 = 47,880 : x
  2. Step 2: Convert to fraction form
    85,608.18/118,139.58 = 47,880/x
  3. Step 3: Cross multiply
    85,608.18x = 118,139.58 × 47,880
  4. Step 4: Simplify right side
    85,608.18x = 5,656,523,090.40
  5. Step 5: Solve for x
    x = 5,656,523,090.40/85,608.18
  6. Step 6: Final answer
    x = 66,074.56

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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.