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Finding the Fourth Proportional to 159,210.80, 219,705.36 and 87,590.08

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Solution

The fourth proportional to 159,210.80, 219,705.36 and 87,590.08 is: 120,871.26

Step by Step Solution

  1. Step 1: Write the proportion equation
    159,210.80 : 219,705.36 = 87,590.08 : x
  2. Step 2: Convert to fraction form
    159,210.80/219,705.36 = 87,590.08/x
  3. Step 3: Cross multiply
    159,210.80x = 219,705.36 × 87,590.08
  4. Step 4: Simplify right side
    159,210.80x = 19,244,010,058.83
  5. Step 5: Solve for x
    x = 19,244,010,058.83/159,210.80
  6. Step 6: Final answer
    x = 120,871.26

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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.