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Finding the Fourth Proportional to 70,878, 97,811.64 and 39,046.89

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Solution

The fourth proportional to 70,878, 97,811.64 and 39,046.89 is: 53,884.71

Step by Step Solution

  1. Step 1: Write the proportion equation
    70,878 : 97,811.64 = 39,046.89 : x
  2. Step 2: Convert to fraction form
    70,878/97,811.64 = 39,046.89/x
  3. Step 3: Cross multiply
    70,878x = 97,811.64 × 39,046.89
  4. Step 4: Simplify right side
    70,878x = 3,819,240,347.80
  5. Step 5: Solve for x
    x = 3,819,240,347.80/70,878
  6. Step 6: Final answer
    x = 53,884.71

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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.