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Finding the Fourth Proportional to 70,930.32, 97,879.92 and 39,093.72

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Solution

The fourth proportional to 70,930.32, 97,879.92 and 39,093.72 is: 53,947.17

Step by Step Solution

  1. Step 1: Write the proportion equation
    70,930.32 : 97,879.92 = 39,093.72 : x
  2. Step 2: Convert to fraction form
    70,930.32/97,879.92 = 39,093.72/x
  3. Step 3: Cross multiply
    70,930.32x = 97,879.92 × 39,093.72
  4. Step 4: Simplify right side
    70,930.32x = 3,826,490,186.10
  5. Step 5: Solve for x
    x = 3,826,490,186.10/70,930.32
  6. Step 6: Final answer
    x = 53,947.17

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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.