Home / 78,429.24-117,643.86-28,500.03

Finding the Fourth Proportional to 78,429.24, 117,643.86 and 28,500.03

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Solution

The fourth proportional to 78,429.24, 117,643.86 and 28,500.03 is: 42,750.05

Step by Step Solution

  1. Step 1: Write the proportion equation
    78,429.24 : 117,643.86 = 28,500.03 : x
  2. Step 2: Convert to fraction form
    78,429.24/117,643.86 = 28,500.03/x
  3. Step 3: Cross multiply
    78,429.24x = 117,643.86 × 28,500.03
  4. Step 4: Simplify right side
    78,429.24x = 3,352,853,539.32
  5. Step 5: Solve for x
    x = 3,352,853,539.32/78,429.24
  6. Step 6: Final answer
    x = 42,750.05

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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.