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Finding the Fourth Proportional to 123,112.80, 184,615.20 and 56,530.80

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Solution

The fourth proportional to 123,112.80, 184,615.20 and 56,530.80 is: 84,771.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    123,112.80 : 184,615.20 = 56,530.80 : x
  2. Step 2: Convert to fraction form
    123,112.80/184,615.20 = 56,530.80/x
  3. Step 3: Cross multiply
    123,112.80x = 184,615.20 × 56,530.80
  4. Step 4: Simplify right side
    123,112.80x = 10,436,444,948.16
  5. Step 5: Solve for x
    x = 10,436,444,948.16/123,112.80
  6. Step 6: Final answer
    x = 84,771.40

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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.