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Finding the Fourth Proportional to 115,355.80, 172,950.60 and 70,890.64

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Solution

The fourth proportional to 115,355.80, 172,950.60 and 70,890.64 is: 106,284.89

Step by Step Solution

  1. Step 1: Write the proportion equation
    115,355.80 : 172,950.60 = 70,890.64 : x
  2. Step 2: Convert to fraction form
    115,355.80/172,950.60 = 70,890.64/x
  3. Step 3: Cross multiply
    115,355.80x = 172,950.60 × 70,890.64
  4. Step 4: Simplify right side
    115,355.80x = 12,260,578,722.38
  5. Step 5: Solve for x
    x = 12,260,578,722.38/115,355.80
  6. Step 6: Final answer
    x = 106,284.89

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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.