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Finding the Fourth Proportional to 243,640.89, 336,231.81 and 136,215.45

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Solution

The fourth proportional to 243,640.89, 336,231.81 and 136,215.45 is: 187,981.45

Step by Step Solution

  1. Step 1: Write the proportion equation
    243,640.89 : 336,231.81 = 136,215.45 : x
  2. Step 2: Convert to fraction form
    243,640.89/336,231.81 = 136,215.45/x
  3. Step 3: Cross multiply
    243,640.89x = 336,231.81 × 136,215.45
  4. Step 4: Simplify right side
    243,640.89x = 45,799,967,303.46
  5. Step 5: Solve for x
    x = 45,799,967,303.46/243,640.89
  6. Step 6: Final answer
    x = 187,981.45

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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.