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Finding the Fourth Proportional to 245,395.65, 338,666.45 and 136,520.50

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Solution

The fourth proportional to 245,395.65, 338,666.45 and 136,520.50 is: 188,409.66

Step by Step Solution

  1. Step 1: Write the proportion equation
    245,395.65 : 338,666.45 = 136,520.50 : x
  2. Step 2: Convert to fraction form
    245,395.65/338,666.45 = 136,520.50/x
  3. Step 3: Cross multiply
    245,395.65x = 338,666.45 × 136,520.50
  4. Step 4: Simplify right side
    245,395.65x = 46,234,910,711.29
  5. Step 5: Solve for x
    x = 46,234,910,711.29/245,395.65
  6. Step 6: Final answer
    x = 188,409.66

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.