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Finding the Fourth Proportional to 45,851.80, 68,712.90 and 28,269.40

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Solution

The fourth proportional to 45,851.80, 68,712.90 and 28,269.40 is: 42,364.15

Step by Step Solution

  1. Step 1: Write the proportion equation
    45,851.80 : 68,712.90 = 28,269.40 : x
  2. Step 2: Convert to fraction form
    45,851.80/68,712.90 = 28,269.40/x
  3. Step 3: Cross multiply
    45,851.80x = 68,712.90 × 28,269.40
  4. Step 4: Simplify right side
    45,851.80x = 1,942,472,455.26
  5. Step 5: Solve for x
    x = 1,942,472,455.26/45,851.80
  6. Step 6: Final answer
    x = 42,364.15

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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.