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Finding the Fourth Proportional to 352,890.90, 529,336.35 and 86,647.95

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Solution

The fourth proportional to 352,890.90, 529,336.35 and 86,647.95 is: 129,971.93

Step by Step Solution

  1. Step 1: Write the proportion equation
    352,890.90 : 529,336.35 = 86,647.95 : x
  2. Step 2: Convert to fraction form
    352,890.90/529,336.35 = 86,647.95/x
  3. Step 3: Cross multiply
    352,890.90x = 529,336.35 × 86,647.95
  4. Step 4: Simplify right side
    352,890.90x = 45,865,909,587.98
  5. Step 5: Solve for x
    x = 45,865,909,587.98/352,890.90
  6. Step 6: Final answer
    x = 129,971.93

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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.