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Finding the Fourth Proportional to 160,428.91, 221,391.97 and 87,836.51

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Solution

The fourth proportional to 160,428.91, 221,391.97 and 87,836.51 is: 121,214.42

Step by Step Solution

  1. Step 1: Write the proportion equation
    160,428.91 : 221,391.97 = 87,836.51 : x
  2. Step 2: Convert to fraction form
    160,428.91/221,391.97 = 87,836.51/x
  3. Step 3: Cross multiply
    160,428.91x = 221,391.97 × 87,836.51
  4. Step 4: Simplify right side
    160,428.91x = 19,446,297,547.64
  5. Step 5: Solve for x
    x = 19,446,297,547.64/160,428.91
  6. Step 6: Final answer
    x = 121,214.42

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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.