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Finding the Fourth Proportional to 128,171.71, 176,871.58 and 73,719.77

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Solution

The fourth proportional to 128,171.71, 176,871.58 and 73,719.77 is: 101,730.19

Step by Step Solution

  1. Step 1: Write the proportion equation
    128,171.71 : 176,871.58 = 73,719.77 : x
  2. Step 2: Convert to fraction form
    128,171.71/176,871.58 = 73,719.77/x
  3. Step 3: Cross multiply
    128,171.71x = 176,871.58 × 73,719.77
  4. Step 4: Simplify right side
    128,171.71x = 13,038,932,197.14
  5. Step 5: Solve for x
    x = 13,038,932,197.14/128,171.71
  6. Step 6: Final answer
    x = 101,730.19

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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.