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Finding the Fourth Proportional to 117,639.72, 176,459.58 and 42,745.92

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Solution

The fourth proportional to 117,639.72, 176,459.58 and 42,745.92 is: 64,118.88

Step by Step Solution

  1. Step 1: Write the proportion equation
    117,639.72 : 176,459.58 = 42,745.92 : x
  2. Step 2: Convert to fraction form
    117,639.72/176,459.58 = 42,745.92/x
  3. Step 3: Cross multiply
    117,639.72x = 176,459.58 × 42,745.92
  4. Step 4: Simplify right side
    117,639.72x = 7,542,927,089.91
  5. Step 5: Solve for x
    x = 7,542,927,089.91/117,639.72
  6. Step 6: Final answer
    x = 64,118.88

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.