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Finding the Fourth Proportional to 163,812.70, 245,719.05 and 80,868.70

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Solution

The fourth proportional to 163,812.70, 245,719.05 and 80,868.70 is: 121,303.05

Step by Step Solution

  1. Step 1: Write the proportion equation
    163,812.70 : 245,719.05 = 80,868.70 : x
  2. Step 2: Convert to fraction form
    163,812.70/245,719.05 = 80,868.70/x
  3. Step 3: Cross multiply
    163,812.70x = 245,719.05 × 80,868.70
  4. Step 4: Simplify right side
    163,812.70x = 19,870,980,138.74
  5. Step 5: Solve for x
    x = 19,870,980,138.74/163,812.70
  6. Step 6: Final answer
    x = 121,303.05

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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.