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Finding the Fourth Proportional to 527,878.15, 791,809.80 and 128,519.80

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Solution

The fourth proportional to 527,878.15, 791,809.80 and 128,519.80 is: 192,777.89

Step by Step Solution

  1. Step 1: Write the proportion equation
    527,878.15 : 791,809.80 = 128,519.80 : x
  2. Step 2: Convert to fraction form
    527,878.15/791,809.80 = 128,519.80/x
  3. Step 3: Cross multiply
    527,878.15x = 791,809.80 × 128,519.80
  4. Step 4: Simplify right side
    527,878.15x = 101,763,237,134.04
  5. Step 5: Solve for x
    x = 101,763,237,134.04/527,878.15
  6. Step 6: Final answer
    x = 192,777.89

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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.