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Finding the Fourth Proportional to 55,387, 76,434.38 and 30,236.76

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Solution

The fourth proportional to 55,387, 76,434.38 and 30,236.76 is: 41,726.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    55,387 : 76,434.38 = 30,236.76 : x
  2. Step 2: Convert to fraction form
    55,387/76,434.38 = 30,236.76/x
  3. Step 3: Cross multiply
    55,387x = 76,434.38 × 30,236.76
  4. Step 4: Simplify right side
    55,387x = 2,311,128,003.81
  5. Step 5: Solve for x
    x = 2,311,128,003.81/55,387
  6. Step 6: Final answer
    x = 41,726.90

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Double scale
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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.