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Finding the Fourth Proportional to 354,281.10, 531,421.65 and 144,069.90

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Solution

The fourth proportional to 354,281.10, 531,421.65 and 144,069.90 is: 216,104.85

Step by Step Solution

  1. Step 1: Write the proportion equation
    354,281.10 : 531,421.65 = 144,069.90 : x
  2. Step 2: Convert to fraction form
    354,281.10/531,421.65 = 144,069.90/x
  3. Step 3: Cross multiply
    354,281.10x = 531,421.65 × 144,069.90
  4. Step 4: Simplify right side
    354,281.10x = 76,561,863,973.34
  5. Step 5: Solve for x
    x = 76,561,863,973.34/354,281.10
  6. Step 6: Final answer
    x = 216,104.85

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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.