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Finding the Fourth Proportional to 115,805.40, 173,664.90 and 45,670.20

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Solution

The fourth proportional to 115,805.40, 173,664.90 and 45,670.20 is: 68,488.26

Step by Step Solution

  1. Step 1: Write the proportion equation
    115,805.40 : 173,664.90 = 45,670.20 : x
  2. Step 2: Convert to fraction form
    115,805.40/173,664.90 = 45,670.20/x
  3. Step 3: Cross multiply
    115,805.40x = 173,664.90 × 45,670.20
  4. Step 4: Simplify right side
    115,805.40x = 7,931,310,715.98
  5. Step 5: Solve for x
    x = 7,931,310,715.98/115,805.40
  6. Step 6: Final answer
    x = 68,488.26

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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.