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Finding the Fourth Proportional to 159,008.84, 219,437.46 and 87,391.40

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Solution

The fourth proportional to 159,008.84, 219,437.46 and 87,391.40 is: 120,603.02

Step by Step Solution

  1. Step 1: Write the proportion equation
    159,008.84 : 219,437.46 = 87,391.40 : x
  2. Step 2: Convert to fraction form
    159,008.84/219,437.46 = 87,391.40/x
  3. Step 3: Cross multiply
    159,008.84x = 219,437.46 × 87,391.40
  4. Step 4: Simplify right side
    159,008.84x = 19,176,946,841.84
  5. Step 5: Solve for x
    x = 19,176,946,841.84/159,008.84
  6. Step 6: Final answer
    x = 120,603.02

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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.