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Finding the Fourth Proportional to 82,666.40, 123,999.60 and 43,235.60

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Solution

The fourth proportional to 82,666.40, 123,999.60 and 43,235.60 is: 64,853.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    82,666.40 : 123,999.60 = 43,235.60 : x
  2. Step 2: Convert to fraction form
    82,666.40/123,999.60 = 43,235.60/x
  3. Step 3: Cross multiply
    82,666.40x = 123,999.60 × 43,235.60
  4. Step 4: Simplify right side
    82,666.40x = 5,361,197,105.76
  5. Step 5: Solve for x
    x = 5,361,197,105.76/82,666.40
  6. Step 6: Final answer
    x = 64,853.40

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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.