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Finding the Fourth Proportional to 251,711.80, 377,567.70 and 139,737.40

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Solution

The fourth proportional to 251,711.80, 377,567.70 and 139,737.40 is: 209,606.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    251,711.80 : 377,567.70 = 139,737.40 : x
  2. Step 2: Convert to fraction form
    251,711.80/377,567.70 = 139,737.40/x
  3. Step 3: Cross multiply
    251,711.80x = 377,567.70 × 139,737.40
  4. Step 4: Simplify right side
    251,711.80x = 52,760,328,721.98
  5. Step 5: Solve for x
    x = 52,760,328,721.98/251,711.80
  6. Step 6: Final answer
    x = 209,606.10

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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.