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Finding the Fourth Proportional to 78,897.51, 118,342.26 and 28,973.79

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Solution

The fourth proportional to 78,897.51, 118,342.26 and 28,973.79 is: 43,459.21

Step by Step Solution

  1. Step 1: Write the proportion equation
    78,897.51 : 118,342.26 = 28,973.79 : x
  2. Step 2: Convert to fraction form
    78,897.51/118,342.26 = 28,973.79/x
  3. Step 3: Cross multiply
    78,897.51x = 118,342.26 × 28,973.79
  4. Step 4: Simplify right side
    78,897.51x = 3,428,823,789.37
  5. Step 5: Solve for x
    x = 3,428,823,789.37/78,897.51
  6. Step 6: Final answer
    x = 43,459.21

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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.