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Finding the Fourth Proportional to 153,861.20, 230,856.60 and 83,790.80

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Solution

The fourth proportional to 153,861.20, 230,856.60 and 83,790.80 is: 125,721.49

Step by Step Solution

  1. Step 1: Write the proportion equation
    153,861.20 : 230,856.60 = 83,790.80 : x
  2. Step 2: Convert to fraction form
    153,861.20/230,856.60 = 83,790.80/x
  3. Step 3: Cross multiply
    153,861.20x = 230,856.60 × 83,790.80
  4. Step 4: Simplify right side
    153,861.20x = 19,343,659,199.28
  5. Step 5: Solve for x
    x = 19,343,659,199.28/153,861.20
  6. Step 6: Final answer
    x = 125,721.49

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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.