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Finding the Fourth Proportional to 122,506.40, 183,759.60 and 91,402.40

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Solution

The fourth proportional to 122,506.40, 183,759.60 and 91,402.40 is: 137,103.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    122,506.40 : 183,759.60 = 91,402.40 : x
  2. Step 2: Convert to fraction form
    122,506.40/183,759.60 = 91,402.40/x
  3. Step 3: Cross multiply
    122,506.40x = 183,759.60 × 91,402.40
  4. Step 4: Simplify right side
    122,506.40x = 16,796,068,463.04
  5. Step 5: Solve for x
    x = 16,796,068,463.04/122,506.40
  6. Step 6: Final answer
    x = 137,103.60

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.