Home / 78,023.13-117,007.01-28,089.81

Finding the Fourth Proportional to 78,023.13, 117,007.01 and 28,089.81

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Solution

The fourth proportional to 78,023.13, 117,007.01 and 28,089.81 is: 42,124.75

Step by Step Solution

  1. Step 1: Write the proportion equation
    78,023.13 : 117,007.01 = 28,089.81 : x
  2. Step 2: Convert to fraction form
    78,023.13/117,007.01 = 28,089.81/x
  3. Step 3: Cross multiply
    78,023.13x = 117,007.01 × 28,089.81
  4. Step 4: Simplify right side
    78,023.13x = 3,286,704,539.12
  5. Step 5: Solve for x
    x = 3,286,704,539.12/78,023.13
  6. Step 6: Final answer
    x = 42,124.75

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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.