Home / 160,821.43-221,788.32-100,397.68

Finding the Fourth Proportional to 160,821.43, 221,788.32 and 100,397.68

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Solution

The fourth proportional to 160,821.43, 221,788.32 and 100,397.68 is: 138,458.12

Step by Step Solution

  1. Step 1: Write the proportion equation
    160,821.43 : 221,788.32 = 100,397.68 : x
  2. Step 2: Convert to fraction form
    160,821.43/221,788.32 = 100,397.68/x
  3. Step 3: Cross multiply
    160,821.43x = 221,788.32 × 100,397.68
  4. Step 4: Simplify right side
    160,821.43x = 22,267,032,779.10
  5. Step 5: Solve for x
    x = 22,267,032,779.10/160,821.43
  6. Step 6: Final answer
    x = 138,458.12

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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.