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Finding the Fourth Proportional to 515,903.80, 773,855.70 and 136,823.80

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Solution

The fourth proportional to 515,903.80, 773,855.70 and 136,823.80 is: 205,235.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    515,903.80 : 773,855.70 = 136,823.80 : x
  2. Step 2: Convert to fraction form
    515,903.80/773,855.70 = 136,823.80/x
  3. Step 3: Cross multiply
    515,903.80x = 773,855.70 × 136,823.80
  4. Step 4: Simplify right side
    515,903.80x = 105,881,877,525.66
  5. Step 5: Solve for x
    x = 105,881,877,525.66/515,903.80
  6. Step 6: Final answer
    x = 205,235.70

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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.