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Finding the Fourth Proportional to 159,028.76, 219,461.36 and 86,431.64

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Solution

The fourth proportional to 159,028.76, 219,461.36 and 86,431.64 is: 119,276.57

Step by Step Solution

  1. Step 1: Write the proportion equation
    159,028.76 : 219,461.36 = 86,431.64 : x
  2. Step 2: Convert to fraction form
    159,028.76/219,461.36 = 86,431.64/x
  3. Step 3: Cross multiply
    159,028.76x = 219,461.36 × 86,431.64
  4. Step 4: Simplify right side
    159,028.76x = 18,968,403,731.97
  5. Step 5: Solve for x
    x = 18,968,403,731.97/159,028.76
  6. Step 6: Final answer
    x = 119,276.57

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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.