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Finding the Fourth Proportional to 122,235, 168,630.84 and 86,455.68

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Solution

The fourth proportional to 122,235, 168,630.84 and 86,455.68 is: 119,271.03

Step by Step Solution

  1. Step 1: Write the proportion equation
    122,235 : 168,630.84 = 86,455.68 : x
  2. Step 2: Convert to fraction form
    122,235/168,630.84 = 86,455.68/x
  3. Step 3: Cross multiply
    122,235x = 168,630.84 × 86,455.68
  4. Step 4: Simplify right side
    122,235x = 14,579,093,941.17
  5. Step 5: Solve for x
    x = 14,579,093,941.17/122,235
  6. Step 6: Final answer
    x = 119,271.03

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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.