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Finding the Fourth Proportional to 354,421.20, 531,448.20 and 105,070.80

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Solution

The fourth proportional to 354,421.20, 531,448.20 and 105,070.80 is: 157,551.77

Step by Step Solution

  1. Step 1: Write the proportion equation
    354,421.20 : 531,448.20 = 105,070.80 : x
  2. Step 2: Convert to fraction form
    354,421.20/531,448.20 = 105,070.80/x
  3. Step 3: Cross multiply
    354,421.20x = 531,448.20 × 105,070.80
  4. Step 4: Simplify right side
    354,421.20x = 55,839,687,532.56
  5. Step 5: Solve for x
    x = 55,839,687,532.56/354,421.20
  6. Step 6: Final answer
    x = 157,551.77

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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.