Home / 78,668.74-108,562.26-42,858.64

Finding the Fourth Proportional to 78,668.74, 108,562.26 and 42,858.64

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Solution

The fourth proportional to 78,668.74, 108,562.26 and 42,858.64 is: 59,144.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    78,668.74 : 108,562.26 = 42,858.64 : x
  2. Step 2: Convert to fraction form
    78,668.74/108,562.26 = 42,858.64/x
  3. Step 3: Cross multiply
    78,668.74x = 108,562.26 × 42,858.64
  4. Step 4: Simplify right side
    78,668.74x = 4,652,830,818.93
  5. Step 5: Solve for x
    x = 4,652,830,818.93/78,668.74
  6. Step 6: Final answer
    x = 59,144.60

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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.