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Finding the Fourth Proportional to 242,540.70, 334,730.79 and 135,128.22

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Solution

The fourth proportional to 242,540.70, 334,730.79 and 135,128.22 is: 186,490.66

Step by Step Solution

  1. Step 1: Write the proportion equation
    242,540.70 : 334,730.79 = 135,128.22 : x
  2. Step 2: Convert to fraction form
    242,540.70/334,730.79 = 135,128.22/x
  3. Step 3: Cross multiply
    242,540.70x = 334,730.79 × 135,128.22
  4. Step 4: Simplify right side
    242,540.70x = 45,231,575,831.89
  5. Step 5: Solve for x
    x = 45,231,575,831.89/242,540.70
  6. Step 6: Final answer
    x = 186,490.66

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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.