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Finding the Fourth Proportional to 293,128.40, 439,692.60 and 71,512.40

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Solution

The fourth proportional to 293,128.40, 439,692.60 and 71,512.40 is: 107,268.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    293,128.40 : 439,692.60 = 71,512.40 : x
  2. Step 2: Convert to fraction form
    293,128.40/439,692.60 = 71,512.40/x
  3. Step 3: Cross multiply
    293,128.40x = 439,692.60 × 71,512.40
  4. Step 4: Simplify right side
    293,128.40x = 31,443,473,088.24
  5. Step 5: Solve for x
    x = 31,443,473,088.24/293,128.40
  6. Step 6: Final answer
    x = 107,268.60

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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.