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Finding the Fourth Proportional to 470,147.70, 705,221.55 and 137,723.70

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Solution

The fourth proportional to 470,147.70, 705,221.55 and 137,723.70 is: 206,585.55

Step by Step Solution

  1. Step 1: Write the proportion equation
    470,147.70 : 705,221.55 = 137,723.70 : x
  2. Step 2: Convert to fraction form
    470,147.70/705,221.55 = 137,723.70/x
  3. Step 3: Cross multiply
    470,147.70x = 705,221.55 × 137,723.70
  4. Step 4: Simplify right side
    470,147.70x = 97,125,721,185.74
  5. Step 5: Solve for x
    x = 97,125,721,185.74/470,147.70
  6. Step 6: Final answer
    x = 206,585.55

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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.