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Finding the Fourth Proportional to 70,918.20, 97,866.95 and 39,087.09

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Solution

The fourth proportional to 70,918.20, 97,866.95 and 39,087.09 is: 53,940.09

Step by Step Solution

  1. Step 1: Write the proportion equation
    70,918.20 : 97,866.95 = 39,087.09 : x
  2. Step 2: Convert to fraction form
    70,918.20/97,866.95 = 39,087.09/x
  3. Step 3: Cross multiply
    70,918.20x = 97,866.95 × 39,087.09
  4. Step 4: Simplify right side
    70,918.20x = 3,825,334,087.24
  5. Step 5: Solve for x
    x = 3,825,334,087.24/70,918.20
  6. Step 6: Final answer
    x = 53,940.09

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1.5x scale

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.