Home / 78,935.30-118,400.21-19,771.48

Finding the Fourth Proportional to 78,935.30, 118,400.21 and 19,771.48

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Solution

The fourth proportional to 78,935.30, 118,400.21 and 19,771.48 is: 29,656.53

Step by Step Solution

  1. Step 1: Write the proportion equation
    78,935.30 : 118,400.21 = 19,771.48 : x
  2. Step 2: Convert to fraction form
    78,935.30/118,400.21 = 19,771.48/x
  3. Step 3: Cross multiply
    78,935.30x = 118,400.21 × 19,771.48
  4. Step 4: Simplify right side
    78,935.30x = 2,340,947,384.01
  5. Step 5: Solve for x
    x = 2,340,947,384.01/78,935.30
  6. Step 6: Final answer
    x = 29,656.53

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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.