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Finding the Fourth Proportional to 70,545.85, 105,778.68 and 54,529.72

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Solution

The fourth proportional to 70,545.85, 105,778.68 and 54,529.72 is: 81,763.59

Step by Step Solution

  1. Step 1: Write the proportion equation
    70,545.85 : 105,778.68 = 54,529.72 : x
  2. Step 2: Convert to fraction form
    70,545.85/105,778.68 = 54,529.72/x
  3. Step 3: Cross multiply
    70,545.85x = 105,778.68 × 54,529.72
  4. Step 4: Simplify right side
    70,545.85x = 5,768,081,802.37
  5. Step 5: Solve for x
    x = 5,768,081,802.37/70,545.85
  6. Step 6: Final answer
    x = 81,763.59

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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.