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Finding the Fourth Proportional to 78,256.80, 107,992.40 and 43,801.02

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Solution

The fourth proportional to 78,256.80, 107,992.40 and 43,801.02 is: 60,444.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    78,256.80 : 107,992.40 = 43,801.02 : x
  2. Step 2: Convert to fraction form
    78,256.80/107,992.40 = 43,801.02/x
  3. Step 3: Cross multiply
    78,256.80x = 107,992.40 × 43,801.02
  4. Step 4: Simplify right side
    78,256.80x = 4,730,177,272.25
  5. Step 5: Solve for x
    x = 4,730,177,272.25/78,256.80
  6. Step 6: Final answer
    x = 60,444.30

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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.