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Finding the Fourth Proportional to 428,599.09, 642,897.35 and 108,750.34

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Solution

The fourth proportional to 428,599.09, 642,897.35 and 108,750.34 is: 163,125.18

Step by Step Solution

  1. Step 1: Write the proportion equation
    428,599.09 : 642,897.35 = 108,750.34 : x
  2. Step 2: Convert to fraction form
    428,599.09/642,897.35 = 108,750.34/x
  3. Step 3: Cross multiply
    428,599.09x = 642,897.35 × 108,750.34
  4. Step 4: Simplify right side
    428,599.09x = 69,915,305,397.60
  5. Step 5: Solve for x
    x = 69,915,305,397.60/428,599.09
  6. Step 6: Final answer
    x = 163,125.18

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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.