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Finding the Fourth Proportional to 78,855.51, 108,859.64 and 48,657.47

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Solution

The fourth proportional to 78,855.51, 108,859.64 and 48,657.47 is: 67,171.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    78,855.51 : 108,859.64 = 48,657.47 : x
  2. Step 2: Convert to fraction form
    78,855.51/108,859.64 = 48,657.47/x
  3. Step 3: Cross multiply
    78,855.51x = 108,859.64 × 48,657.47
  4. Step 4: Simplify right side
    78,855.51x = 5,296,834,696.37
  5. Step 5: Solve for x
    x = 5,296,834,696.37/78,855.51
  6. Step 6: Final answer
    x = 67,171.40

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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.