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Finding the Fourth Proportional to 45,420.40, 68,141.40 and 19,111.60

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Solution

The fourth proportional to 45,420.40, 68,141.40 and 19,111.60 is: 28,671.94

Step by Step Solution

  1. Step 1: Write the proportion equation
    45,420.40 : 68,141.40 = 19,111.60 : x
  2. Step 2: Convert to fraction form
    45,420.40/68,141.40 = 19,111.60/x
  3. Step 3: Cross multiply
    45,420.40x = 68,141.40 × 19,111.60
  4. Step 4: Simplify right side
    45,420.40x = 1,302,291,180.24
  5. Step 5: Solve for x
    x = 1,302,291,180.24/45,420.40
  6. Step 6: Final answer
    x = 28,671.94

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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.