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Finding the Fourth Proportional to 159,881.81, 220,638.69 and 88,261.88

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Solution

The fourth proportional to 159,881.81, 220,638.69 and 88,261.88 is: 121,802.38

Step by Step Solution

  1. Step 1: Write the proportion equation
    159,881.81 : 220,638.69 = 88,261.88 : x
  2. Step 2: Convert to fraction form
    159,881.81/220,638.69 = 88,261.88/x
  3. Step 3: Cross multiply
    159,881.81x = 220,638.69 × 88,261.88
  4. Step 4: Simplify right side
    159,881.81x = 19,473,985,580.14
  5. Step 5: Solve for x
    x = 19,473,985,580.14/159,881.81
  6. Step 6: Final answer
    x = 121,802.38

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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.