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Finding the Fourth Proportional to 352,871.12, 529,316.40 and 86,630.60

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Solution

The fourth proportional to 352,871.12, 529,316.40 and 86,630.60 is: 129,948.29

Step by Step Solution

  1. Step 1: Write the proportion equation
    352,871.12 : 529,316.40 = 86,630.60 : x
  2. Step 2: Convert to fraction form
    352,871.12/529,316.40 = 86,630.60/x
  3. Step 3: Cross multiply
    352,871.12x = 529,316.40 × 86,630.60
  4. Step 4: Simplify right side
    352,871.12x = 45,854,997,321.84
  5. Step 5: Solve for x
    x = 45,854,997,321.84/352,871.12
  6. Step 6: Final answer
    x = 129,948.29

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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.