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Finding the Fourth Proportional to 68,076.51, 93,931.68 and 39,776.73

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Solution

The fourth proportional to 68,076.51, 93,931.68 and 39,776.73 is: 54,883.76

Step by Step Solution

  1. Step 1: Write the proportion equation
    68,076.51 : 93,931.68 = 39,776.73 : x
  2. Step 2: Convert to fraction form
    68,076.51/93,931.68 = 39,776.73/x
  3. Step 3: Cross multiply
    68,076.51x = 93,931.68 × 39,776.73
  4. Step 4: Simplify right side
    68,076.51x = 3,736,295,073.81
  5. Step 5: Solve for x
    x = 3,736,295,073.81/68,076.51
  6. Step 6: Final answer
    x = 54,883.76

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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.