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Finding the Fourth Proportional to 51,506.40, 77,240.40 and 20,335.20

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Solution

The fourth proportional to 51,506.40, 77,240.40 and 20,335.20 is: 30,495.22

Step by Step Solution

  1. Step 1: Write the proportion equation
    51,506.40 : 77,240.40 = 20,335.20 : x
  2. Step 2: Convert to fraction form
    51,506.40/77,240.40 = 20,335.20/x
  3. Step 3: Cross multiply
    51,506.40x = 77,240.40 × 20,335.20
  4. Step 4: Simplify right side
    51,506.40x = 1,570,698,982.08
  5. Step 5: Solve for x
    x = 1,570,698,982.08/51,506.40
  6. Step 6: Final answer
    x = 30,495.22

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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.