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Finding the Fourth Proportional to 123,358.80, 185,038.20 and 112,861.20

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Solution

The fourth proportional to 123,358.80, 185,038.20 and 112,861.20 is: 169,291.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    123,358.80 : 185,038.20 = 112,861.20 : x
  2. Step 2: Convert to fraction form
    123,358.80/185,038.20 = 112,861.20/x
  3. Step 3: Cross multiply
    123,358.80x = 185,038.20 × 112,861.20
  4. Step 4: Simplify right side
    123,358.80x = 20,883,633,297.84
  5. Step 5: Solve for x
    x = 20,883,633,297.84/123,358.80
  6. Step 6: Final answer
    x = 169,291.80

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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.