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Finding the Fourth Proportional to 70,947.01, 97,905 and 39,115.09

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Solution

The fourth proportional to 70,947.01, 97,905 and 39,115.09 is: 53,977.79

Step by Step Solution

  1. Step 1: Write the proportion equation
    70,947.01 : 97,905 = 39,115.09 : x
  2. Step 2: Convert to fraction form
    70,947.01/97,905 = 39,115.09/x
  3. Step 3: Cross multiply
    70,947.01x = 97,905 × 39,115.09
  4. Step 4: Simplify right side
    70,947.01x = 3,829,562,886.45
  5. Step 5: Solve for x
    x = 3,829,562,886.45/70,947.01
  6. Step 6: Final answer
    x = 53,977.79

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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.