Home / 78,590.94-108,456.63-42,782.07

Finding the Fourth Proportional to 78,590.94, 108,456.63 and 42,782.07

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Solution

The fourth proportional to 78,590.94, 108,456.63 and 42,782.07 is: 59,039.87

Step by Step Solution

  1. Step 1: Write the proportion equation
    78,590.94 : 108,456.63 = 42,782.07 : x
  2. Step 2: Convert to fraction form
    78,590.94/108,456.63 = 42,782.07/x
  3. Step 3: Cross multiply
    78,590.94x = 108,456.63 × 42,782.07
  4. Step 4: Simplify right side
    78,590.94x = 4,639,999,136.62
  5. Step 5: Solve for x
    x = 4,639,999,136.62/78,590.94
  6. Step 6: Final answer
    x = 59,039.87

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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.