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Finding the Fourth Proportional to 545,421.20, 818,131.80 and 146,123.60

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Solution

The fourth proportional to 545,421.20, 818,131.80 and 146,123.60 is: 219,185.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    545,421.20 : 818,131.80 = 146,123.60 : x
  2. Step 2: Convert to fraction form
    545,421.20/818,131.80 = 146,123.60/x
  3. Step 3: Cross multiply
    545,421.20x = 818,131.80 × 146,123.60
  4. Step 4: Simplify right side
    545,421.20x = 119,548,363,890.48
  5. Step 5: Solve for x
    x = 119,548,363,890.48/545,421.20
  6. Step 6: Final answer
    x = 219,185.40

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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.