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Finding the Fourth Proportional to 104,381.92, 144,164.40 and 70,330.78

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Solution

The fourth proportional to 104,381.92, 144,164.40 and 70,330.78 is: 97,135.54

Step by Step Solution

  1. Step 1: Write the proportion equation
    104,381.92 : 144,164.40 = 70,330.78 : x
  2. Step 2: Convert to fraction form
    104,381.92/144,164.40 = 70,330.78/x
  3. Step 3: Cross multiply
    104,381.92x = 144,164.40 × 70,330.78
  4. Step 4: Simplify right side
    104,381.92x = 10,139,194,339.82
  5. Step 5: Solve for x
    x = 10,139,194,339.82/104,381.92
  6. Step 6: Final answer
    x = 97,135.54

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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.