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Finding the Fourth Proportional to 51,215.60, 76,823.40 and 45,772.40

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Solution

The fourth proportional to 51,215.60, 76,823.40 and 45,772.40 is: 68,658.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    51,215.60 : 76,823.40 = 45,772.40 : x
  2. Step 2: Convert to fraction form
    51,215.60/76,823.40 = 45,772.40/x
  3. Step 3: Cross multiply
    51,215.60x = 76,823.40 × 45,772.40
  4. Step 4: Simplify right side
    51,215.60x = 3,516,391,394.16
  5. Step 5: Solve for x
    x = 3,516,391,394.16/51,215.60
  6. Step 6: Final answer
    x = 68,658.60

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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.