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Finding the Fourth Proportional to 51,960.40, 77,825.40 and 20,779.60

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Solution

The fourth proportional to 51,960.40, 77,825.40 and 20,779.60 is: 31,123.33

Step by Step Solution

  1. Step 1: Write the proportion equation
    51,960.40 : 77,825.40 = 20,779.60 : x
  2. Step 2: Convert to fraction form
    51,960.40/77,825.40 = 20,779.60/x
  3. Step 3: Cross multiply
    51,960.40x = 77,825.40 × 20,779.60
  4. Step 4: Simplify right side
    51,960.40x = 1,617,180,681.84
  5. Step 5: Solve for x
    x = 1,617,180,681.84/51,960.40
  6. Step 6: Final answer
    x = 31,123.33

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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.