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Finding the Fourth Proportional to 122,509.60, 169,089.60 and 74,752.72

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Solution

The fourth proportional to 122,509.60, 169,089.60 and 74,752.72 is: 103,174.83

Step by Step Solution

  1. Step 1: Write the proportion equation
    122,509.60 : 169,089.60 = 74,752.72 : x
  2. Step 2: Convert to fraction form
    122,509.60/169,089.60 = 74,752.72/x
  3. Step 3: Cross multiply
    122,509.60x = 169,089.60 × 74,752.72
  4. Step 4: Simplify right side
    122,509.60x = 12,639,907,523.71
  5. Step 5: Solve for x
    x = 12,639,907,523.71/122,509.60
  6. Step 6: Final answer
    x = 103,174.83

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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.