Home / 105,239.63-145,120.16-69,383.76

Finding the Fourth Proportional to 105,239.63, 145,120.16 and 69,383.76

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Solution

The fourth proportional to 105,239.63, 145,120.16 and 69,383.76 is: 95,676.72

Step by Step Solution

  1. Step 1: Write the proportion equation
    105,239.63 : 145,120.16 = 69,383.76 : x
  2. Step 2: Convert to fraction form
    105,239.63/145,120.16 = 69,383.76/x
  3. Step 3: Cross multiply
    105,239.63x = 145,120.16 × 69,383.76
  4. Step 4: Simplify right side
    105,239.63x = 10,068,982,005.68
  5. Step 5: Solve for x
    x = 10,068,982,005.68/105,239.63
  6. Step 6: Final answer
    x = 95,676.72

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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.