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Finding the Fourth Proportional to 78,685.92, 118,028.16 and 31,927.68

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Solution

The fourth proportional to 78,685.92, 118,028.16 and 31,927.68 is: 47,891.23

Step by Step Solution

  1. Step 1: Write the proportion equation
    78,685.92 : 118,028.16 = 31,927.68 : x
  2. Step 2: Convert to fraction form
    78,685.92/118,028.16 = 31,927.68/x
  3. Step 3: Cross multiply
    78,685.92x = 118,028.16 × 31,927.68
  4. Step 4: Simplify right side
    78,685.92x = 3,768,365,323.47
  5. Step 5: Solve for x
    x = 3,768,365,323.47/78,685.92
  6. Step 6: Final answer
    x = 47,891.23

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1.5x scale

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.