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Finding the Fourth Proportional to 173,716.40, 260,720.40 and 85,045.70

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Solution

The fourth proportional to 173,716.40, 260,720.40 and 85,045.70 is: 127,639.93

Step by Step Solution

  1. Step 1: Write the proportion equation
    173,716.40 : 260,720.40 = 85,045.70 : x
  2. Step 2: Convert to fraction form
    173,716.40/260,720.40 = 85,045.70/x
  3. Step 3: Cross multiply
    173,716.40x = 260,720.40 × 85,045.70
  4. Step 4: Simplify right side
    173,716.40x = 22,173,148,922.28
  5. Step 5: Solve for x
    x = 22,173,148,922.28/173,716.40
  6. Step 6: Final answer
    x = 127,639.93

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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.