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Finding the Fourth Proportional to 79,090.60, 118,895.10 and 55,877.80

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Solution

The fourth proportional to 79,090.60, 118,895.10 and 55,877.80 is: 83,999.83

Step by Step Solution

  1. Step 1: Write the proportion equation
    79,090.60 : 118,895.10 = 55,877.80 : x
  2. Step 2: Convert to fraction form
    79,090.60/118,895.10 = 55,877.80/x
  3. Step 3: Cross multiply
    79,090.60x = 118,895.10 × 55,877.80
  4. Step 4: Simplify right side
    79,090.60x = 6,643,596,618.78
  5. Step 5: Solve for x
    x = 6,643,596,618.78/79,090.60
  6. Step 6: Final answer
    x = 83,999.83

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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.