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Finding the Fourth Proportional to 343,432.64, 515,173.55 and 90,710.61

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Solution

The fourth proportional to 343,432.64, 515,173.55 and 90,710.61 is: 136,072.41

Step by Step Solution

  1. Step 1: Write the proportion equation
    343,432.64 : 515,173.55 = 90,710.61 : x
  2. Step 2: Convert to fraction form
    343,432.64/515,173.55 = 90,710.61/x
  3. Step 3: Cross multiply
    343,432.64x = 515,173.55 × 90,710.61
  4. Step 4: Simplify right side
    343,432.64x = 46,731,706,932.77
  5. Step 5: Solve for x
    x = 46,731,706,932.77/343,432.64
  6. Step 6: Final answer
    x = 136,072.41

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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.