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Finding the Fourth Proportional to 45,405.40, 68,108.10 and 42,813.40

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Solution

The fourth proportional to 45,405.40, 68,108.10 and 42,813.40 is: 64,220.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    45,405.40 : 68,108.10 = 42,813.40 : x
  2. Step 2: Convert to fraction form
    45,405.40/68,108.10 = 42,813.40/x
  3. Step 3: Cross multiply
    45,405.40x = 68,108.10 × 42,813.40
  4. Step 4: Simplify right side
    45,405.40x = 2,915,939,328.54
  5. Step 5: Solve for x
    x = 2,915,939,328.54/45,405.40
  6. Step 6: Final answer
    x = 64,220.10

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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.