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Finding the Fourth Proportional to 71,720.70, 107,629.65 and 46,699.80

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Solution

The fourth proportional to 71,720.70, 107,629.65 and 46,699.80 is: 70,081.35

Step by Step Solution

  1. Step 1: Write the proportion equation
    71,720.70 : 107,629.65 = 46,699.80 : x
  2. Step 2: Convert to fraction form
    71,720.70/107,629.65 = 46,699.80/x
  3. Step 3: Cross multiply
    71,720.70x = 107,629.65 × 46,699.80
  4. Step 4: Simplify right side
    71,720.70x = 5,026,283,129.07
  5. Step 5: Solve for x
    x = 5,026,283,129.07/71,720.70
  6. Step 6: Final answer
    x = 70,081.35

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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.