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Finding the Fourth Proportional to 136,153.72, 187,891.09 and 74,898.59

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Solution

The fourth proportional to 136,153.72, 187,891.09 and 74,898.59 is: 103,359.48

Step by Step Solution

  1. Step 1: Write the proportion equation
    136,153.72 : 187,891.09 = 74,898.59 : x
  2. Step 2: Convert to fraction form
    136,153.72/187,891.09 = 74,898.59/x
  3. Step 3: Cross multiply
    136,153.72x = 187,891.09 × 74,898.59
  4. Step 4: Simplify right side
    136,153.72x = 14,072,777,714.56
  5. Step 5: Solve for x
    x = 14,072,777,714.56/136,153.72
  6. Step 6: Final answer
    x = 103,359.48

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1.5x scale

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.