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Finding the Fourth Proportional to 243,580.72, 336,142.74 and 136,155.28

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Solution

The fourth proportional to 243,580.72, 336,142.74 and 136,155.28 is: 187,895.04

Step by Step Solution

  1. Step 1: Write the proportion equation
    243,580.72 : 336,142.74 = 136,155.28 : x
  2. Step 2: Convert to fraction form
    243,580.72/336,142.74 = 136,155.28/x
  3. Step 3: Cross multiply
    243,580.72x = 336,142.74 × 136,155.28
  4. Step 4: Simplify right side
    243,580.72x = 45,767,608,884.67
  5. Step 5: Solve for x
    x = 45,767,608,884.67/243,580.72
  6. Step 6: Final answer
    x = 187,895.04

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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.