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Finding the Fourth Proportional to 158,062.36, 218,118 and 86,428.48

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Solution

The fourth proportional to 158,062.36, 218,118 and 86,428.48 is: 119,266.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    158,062.36 : 218,118 = 86,428.48 : x
  2. Step 2: Convert to fraction form
    158,062.36/218,118 = 86,428.48/x
  3. Step 3: Cross multiply
    158,062.36x = 218,118 × 86,428.48
  4. Step 4: Simplify right side
    158,062.36x = 18,851,607,200.64
  5. Step 5: Solve for x
    x = 18,851,607,200.64/158,062.36
  6. Step 6: Final answer
    x = 119,266.90

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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.