Home / 122,137.68-168,549-68,423.21

Finding the Fourth Proportional to 122,137.68, 168,549 and 68,423.21

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Solution

The fourth proportional to 122,137.68, 168,549 and 68,423.21 is: 94,423.46

Step by Step Solution

  1. Step 1: Write the proportion equation
    122,137.68 : 168,549 = 68,423.21 : x
  2. Step 2: Convert to fraction form
    122,137.68/168,549 = 68,423.21/x
  3. Step 3: Cross multiply
    122,137.68x = 168,549 × 68,423.21
  4. Step 4: Simplify right side
    122,137.68x = 11,532,662,779.55
  5. Step 5: Solve for x
    x = 11,532,662,779.55/122,137.68
  6. Step 6: Final answer
    x = 94,423.46

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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.