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Finding the Fourth Proportional to 159,108.72, 219,572.76 and 87,491.76

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Solution

The fourth proportional to 159,108.72, 219,572.76 and 87,491.76 is: 120,740.13

Step by Step Solution

  1. Step 1: Write the proportion equation
    159,108.72 : 219,572.76 = 87,491.76 : x
  2. Step 2: Convert to fraction form
    159,108.72/219,572.76 = 87,491.76/x
  3. Step 3: Cross multiply
    159,108.72x = 219,572.76 × 87,491.76
  4. Step 4: Simplify right side
    159,108.72x = 19,210,807,220.46
  5. Step 5: Solve for x
    x = 19,210,807,220.46/159,108.72
  6. Step 6: Final answer
    x = 120,740.13

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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.