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Finding the Fourth Proportional to 122,307.37, 168,627.92 and 79,210.71

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Solution

The fourth proportional to 122,307.37, 168,627.92 and 79,210.71 is: 109,209.59

Step by Step Solution

  1. Step 1: Write the proportion equation
    122,307.37 : 168,627.92 = 79,210.71 : x
  2. Step 2: Convert to fraction form
    122,307.37/168,627.92 = 79,210.71/x
  3. Step 3: Cross multiply
    122,307.37x = 168,627.92 × 79,210.71
  4. Step 4: Simplify right side
    122,307.37x = 13,357,137,269.02
  5. Step 5: Solve for x
    x = 13,357,137,269.02/122,307.37
  6. Step 6: Final answer
    x = 109,209.59

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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.