Home / 103,127.08-142,383.90-79,210.96

Finding the Fourth Proportional to 103,127.08, 142,383.90 and 79,210.96

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Solution

The fourth proportional to 103,127.08, 142,383.90 and 79,210.96 is: 109,363.76

Step by Step Solution

  1. Step 1: Write the proportion equation
    103,127.08 : 142,383.90 = 79,210.96 : x
  2. Step 2: Convert to fraction form
    103,127.08/142,383.90 = 79,210.96/x
  3. Step 3: Cross multiply
    103,127.08x = 142,383.90 × 79,210.96
  4. Step 4: Simplify right side
    103,127.08x = 11,278,365,407.54
  5. Step 5: Solve for x
    x = 11,278,365,407.54/103,127.08
  6. Step 6: Final answer
    x = 109,363.76

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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.