Home / 78,023.69-117,007.85-28,090.38

Finding the Fourth Proportional to 78,023.69, 117,007.85 and 28,090.38

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Solution

The fourth proportional to 78,023.69, 117,007.85 and 28,090.38 is: 42,125.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    78,023.69 : 117,007.85 = 28,090.38 : x
  2. Step 2: Convert to fraction form
    78,023.69/117,007.85 = 28,090.38/x
  3. Step 3: Cross multiply
    78,023.69x = 117,007.85 × 28,090.38
  4. Step 4: Simplify right side
    78,023.69x = 3,286,794,829.03
  5. Step 5: Solve for x
    x = 3,286,794,829.03/78,023.69
  6. Step 6: Final answer
    x = 42,125.60

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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.