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Finding the Fourth Proportional to 78,458.88, 108,288.99 and 46,621.64

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Solution

The fourth proportional to 78,458.88, 108,288.99 and 46,621.64 is: 64,347.21

Step by Step Solution

  1. Step 1: Write the proportion equation
    78,458.88 : 108,288.99 = 46,621.64 : x
  2. Step 2: Convert to fraction form
    78,458.88/108,288.99 = 46,621.64/x
  3. Step 3: Cross multiply
    78,458.88x = 108,288.99 × 46,621.64
  4. Step 4: Simplify right side
    78,458.88x = 5,048,609,766.30
  5. Step 5: Solve for x
    x = 5,048,609,766.30/78,458.88
  6. Step 6: Final answer
    x = 64,347.21

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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.