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Finding the Fourth Proportional to 124,509.64, 171,823.14 and 67,921

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Solution

The fourth proportional to 124,509.64, 171,823.14 and 67,921 is: 93,730.89

Step by Step Solution

  1. Step 1: Write the proportion equation
    124,509.64 : 171,823.14 = 67,921 : x
  2. Step 2: Convert to fraction form
    124,509.64/171,823.14 = 67,921/x
  3. Step 3: Cross multiply
    124,509.64x = 171,823.14 × 67,921
  4. Step 4: Simplify right side
    124,509.64x = 11,670,399,491.94
  5. Step 5: Solve for x
    x = 11,670,399,491.94/124,509.64
  6. Step 6: Final answer
    x = 93,730.89

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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.