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Finding the Fourth Proportional to 70,918.26, 97,866.90 and 39,087.15

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Solution

The fourth proportional to 70,918.26, 97,866.90 and 39,087.15 is: 53,940.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    70,918.26 : 97,866.90 = 39,087.15 : x
  2. Step 2: Convert to fraction form
    70,918.26/97,866.90 = 39,087.15/x
  3. Step 3: Cross multiply
    70,918.26x = 97,866.90 × 39,087.15
  4. Step 4: Simplify right side
    70,918.26x = 3,825,338,200.34
  5. Step 5: Solve for x
    x = 3,825,338,200.34/70,918.26
  6. Step 6: Final answer
    x = 53,940.10

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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.