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Finding the Fourth Proportional to 159,598.81, 220,247.89 and 87,981.39

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Solution

The fourth proportional to 159,598.81, 220,247.89 and 87,981.39 is: 121,415.16

Step by Step Solution

  1. Step 1: Write the proportion equation
    159,598.81 : 220,247.89 = 87,981.39 : x
  2. Step 2: Convert to fraction form
    159,598.81/220,247.89 = 87,981.39/x
  3. Step 3: Cross multiply
    159,598.81x = 220,247.89 × 87,981.39
  4. Step 4: Simplify right side
    159,598.81x = 19,377,715,506.77
  5. Step 5: Solve for x
    x = 19,377,715,506.77/159,598.81
  6. Step 6: Final answer
    x = 121,415.16

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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.