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Finding the Fourth Proportional to 69,407.36, 95,780.40 and 38,780.70

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Solution

The fourth proportional to 69,407.36, 95,780.40 and 38,780.70 is: 53,516.38

Step by Step Solution

  1. Step 1: Write the proportion equation
    69,407.36 : 95,780.40 = 38,780.70 : x
  2. Step 2: Convert to fraction form
    69,407.36/95,780.40 = 38,780.70/x
  3. Step 3: Cross multiply
    69,407.36x = 95,780.40 × 38,780.70
  4. Step 4: Simplify right side
    69,407.36x = 3,714,430,958.28
  5. Step 5: Solve for x
    x = 3,714,430,958.28/69,407.36
  6. Step 6: Final answer
    x = 53,516.38

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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.