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Finding the Fourth Proportional to 142,408.80, 213,555.60 and 48,866.40

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Solution

The fourth proportional to 142,408.80, 213,555.60 and 48,866.40 is: 73,279.84

Step by Step Solution

  1. Step 1: Write the proportion equation
    142,408.80 : 213,555.60 = 48,866.40 : x
  2. Step 2: Convert to fraction form
    142,408.80/213,555.60 = 48,866.40/x
  3. Step 3: Cross multiply
    142,408.80x = 213,555.60 × 48,866.40
  4. Step 4: Simplify right side
    142,408.80x = 10,435,693,371.84
  5. Step 5: Solve for x
    x = 10,435,693,371.84/142,408.80
  6. Step 6: Final answer
    x = 73,279.84

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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.