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Finding the Fourth Proportional to 243,128.84, 335,253.30 and 158,088.20

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Solution

The fourth proportional to 243,128.84, 335,253.30 and 158,088.20 is: 217,989.73

Step by Step Solution

  1. Step 1: Write the proportion equation
    243,128.84 : 335,253.30 = 158,088.20 : x
  2. Step 2: Convert to fraction form
    243,128.84/335,253.30 = 158,088.20/x
  3. Step 3: Cross multiply
    243,128.84x = 335,253.30 × 158,088.20
  4. Step 4: Simplify right side
    243,128.84x = 52,999,590,741.06
  5. Step 5: Solve for x
    x = 52,999,590,741.06/243,128.84
  6. Step 6: Final answer
    x = 217,989.73

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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.