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Finding the Fourth Proportional to 123,005.80, 184,508.70 and 70,420.60

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Solution

The fourth proportional to 123,005.80, 184,508.70 and 70,420.60 is: 105,630.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    123,005.80 : 184,508.70 = 70,420.60 : x
  2. Step 2: Convert to fraction form
    123,005.80/184,508.70 = 70,420.60/x
  3. Step 3: Cross multiply
    123,005.80x = 184,508.70 × 70,420.60
  4. Step 4: Simplify right side
    123,005.80x = 12,993,213,359.22
  5. Step 5: Solve for x
    x = 12,993,213,359.22/123,005.80
  6. Step 6: Final answer
    x = 105,630.90

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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.