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Finding the Fourth Proportional to 122,509.53, 169,081.47 and 74,790.63

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Solution

The fourth proportional to 122,509.53, 169,081.47 and 74,790.63 is: 103,222.25

Step by Step Solution

  1. Step 1: Write the proportion equation
    122,509.53 : 169,081.47 = 74,790.63 : x
  2. Step 2: Convert to fraction form
    122,509.53/169,081.47 = 74,790.63/x
  3. Step 3: Cross multiply
    122,509.53x = 169,081.47 × 74,790.63
  4. Step 4: Simplify right side
    122,509.53x = 12,645,709,662.63
  5. Step 5: Solve for x
    x = 12,645,709,662.63/122,509.53
  6. Step 6: Final answer
    x = 103,222.25

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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.