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Finding the Fourth Proportional to 145,242.79, 200,453.87 and 81,580.60

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Solution

The fourth proportional to 145,242.79, 200,453.87 and 81,580.60 is: 112,591.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    145,242.79 : 200,453.87 = 81,580.60 : x
  2. Step 2: Convert to fraction form
    145,242.79/200,453.87 = 81,580.60/x
  3. Step 3: Cross multiply
    145,242.79x = 200,453.87 × 81,580.60
  4. Step 4: Simplify right side
    145,242.79x = 16,353,146,986.92
  5. Step 5: Solve for x
    x = 16,353,146,986.92/145,242.79
  6. Step 6: Final answer
    x = 112,591.80

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.