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Finding the Fourth Proportional to 122,341.70, 183,512.55 and 86,912.30

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Solution

The fourth proportional to 122,341.70, 183,512.55 and 86,912.30 is: 130,368.45

Step by Step Solution

  1. Step 1: Write the proportion equation
    122,341.70 : 183,512.55 = 86,912.30 : x
  2. Step 2: Convert to fraction form
    122,341.70/183,512.55 = 86,912.30/x
  3. Step 3: Cross multiply
    122,341.70x = 183,512.55 × 86,912.30
  4. Step 4: Simplify right side
    122,341.70x = 15,949,497,799.37
  5. Step 5: Solve for x
    x = 15,949,497,799.37/122,341.70
  6. Step 6: Final answer
    x = 130,368.45

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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.