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Finding the Fourth Proportional to 78,855.80, 108,823.58 and 43,047.72

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Solution

The fourth proportional to 78,855.80, 108,823.58 and 43,047.72 is: 59,407.26

Step by Step Solution

  1. Step 1: Write the proportion equation
    78,855.80 : 108,823.58 = 43,047.72 : x
  2. Step 2: Convert to fraction form
    78,855.80/108,823.58 = 43,047.72/x
  3. Step 3: Cross multiply
    78,855.80x = 108,823.58 × 43,047.72
  4. Step 4: Simplify right side
    78,855.80x = 4,684,607,001.24
  5. Step 5: Solve for x
    x = 4,684,607,001.24/78,855.80
  6. Step 6: Final answer
    x = 59,407.26

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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.