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Finding the Fourth Proportional to 251,603.96, 347,208.54 and 138,428.60

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Solution

The fourth proportional to 251,603.96, 347,208.54 and 138,428.60 is: 191,028.76

Step by Step Solution

  1. Step 1: Write the proportion equation
    251,603.96 : 347,208.54 = 138,428.60 : x
  2. Step 2: Convert to fraction form
    251,603.96/347,208.54 = 138,428.60/x
  3. Step 3: Cross multiply
    251,603.96x = 347,208.54 × 138,428.60
  4. Step 4: Simplify right side
    251,603.96x = 48,063,592,100.24
  5. Step 5: Solve for x
    x = 48,063,592,100.24/251,603.96
  6. Step 6: Final answer
    x = 191,028.76

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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.