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Finding the Fourth Proportional to 223,703.87, 308,724.63 and 128,216.70

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Solution

The fourth proportional to 223,703.87, 308,724.63 and 128,216.70 is: 176,946.67

Step by Step Solution

  1. Step 1: Write the proportion equation
    223,703.87 : 308,724.63 = 128,216.70 : x
  2. Step 2: Convert to fraction form
    223,703.87/308,724.63 = 128,216.70/x
  3. Step 3: Cross multiply
    223,703.87x = 308,724.63 × 128,216.70
  4. Step 4: Simplify right side
    223,703.87x = 39,583,653,267.32
  5. Step 5: Solve for x
    x = 39,583,653,267.32/223,703.87
  6. Step 6: Final answer
    x = 176,946.67

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.