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Finding the Fourth Proportional to 70,910.47, 97,858.93 and 38,647.78

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Solution

The fourth proportional to 70,910.47, 97,858.93 and 38,647.78 is: 53,335.29

Step by Step Solution

  1. Step 1: Write the proportion equation
    70,910.47 : 97,858.93 = 38,647.78 : x
  2. Step 2: Convert to fraction form
    70,910.47/97,858.93 = 38,647.78/x
  3. Step 3: Cross multiply
    70,910.47x = 97,858.93 × 38,647.78
  4. Step 4: Simplify right side
    70,910.47x = 3,782,030,371.13
  5. Step 5: Solve for x
    x = 3,782,030,371.13/70,910.47
  6. Step 6: Final answer
    x = 53,335.29

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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.