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Finding the Fourth Proportional to 173,551.96, 260,415.57 and 78,721.71

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Solution

The fourth proportional to 173,551.96, 260,415.57 and 78,721.71 is: 118,122.31

Step by Step Solution

  1. Step 1: Write the proportion equation
    173,551.96 : 260,415.57 = 78,721.71 : x
  2. Step 2: Convert to fraction form
    173,551.96/260,415.57 = 78,721.71/x
  3. Step 3: Cross multiply
    173,551.96x = 260,415.57 × 78,721.71
  4. Step 4: Simplify right side
    173,551.96x = 20,500,358,981.02
  5. Step 5: Solve for x
    x = 20,500,358,981.02/173,551.96
  6. Step 6: Final answer
    x = 118,122.31

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.