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Finding the Fourth Proportional to 159,328.56, 219,881.34 and 87,707.82

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Solution

The fourth proportional to 159,328.56, 219,881.34 and 87,707.82 is: 121,041.16

Step by Step Solution

  1. Step 1: Write the proportion equation
    159,328.56 : 219,881.34 = 87,707.82 : x
  2. Step 2: Convert to fraction form
    159,328.56/219,881.34 = 87,707.82/x
  3. Step 3: Cross multiply
    159,328.56x = 219,881.34 × 87,707.82
  4. Step 4: Simplify right side
    159,328.56x = 19,285,312,990.08
  5. Step 5: Solve for x
    x = 19,285,312,990.08/159,328.56
  6. Step 6: Final answer
    x = 121,041.16

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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.