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Finding the Fourth Proportional to 345,087.90, 517,649.40 and 108,432.90

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Solution

The fourth proportional to 345,087.90, 517,649.40 and 108,432.90 is: 162,654.86

Step by Step Solution

  1. Step 1: Write the proportion equation
    345,087.90 : 517,649.40 = 108,432.90 : x
  2. Step 2: Convert to fraction form
    345,087.90/517,649.40 = 108,432.90/x
  3. Step 3: Cross multiply
    345,087.90x = 517,649.40 × 108,432.90
  4. Step 4: Simplify right side
    345,087.90x = 56,130,225,625.26
  5. Step 5: Solve for x
    x = 56,130,225,625.26/345,087.90
  6. Step 6: Final answer
    x = 162,654.86

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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.