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Finding the Fourth Proportional to 122,335.70, 183,503.55 and 86,906.30

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Solution

The fourth proportional to 122,335.70, 183,503.55 and 86,906.30 is: 130,359.45

Step by Step Solution

  1. Step 1: Write the proportion equation
    122,335.70 : 183,503.55 = 86,906.30 : x
  2. Step 2: Convert to fraction form
    122,335.70/183,503.55 = 86,906.30/x
  3. Step 3: Cross multiply
    122,335.70x = 183,503.55 × 86,906.30
  4. Step 4: Simplify right side
    122,335.70x = 15,947,614,567.37
  5. Step 5: Solve for x
    x = 15,947,614,567.37/122,335.70
  6. Step 6: Final answer
    x = 130,359.45

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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.