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Finding the Fourth Proportional to 223,703.80, 308,724.52 and 128,216.65

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Solution

The fourth proportional to 223,703.80, 308,724.52 and 128,216.65 is: 176,946.59

Step by Step Solution

  1. Step 1: Write the proportion equation
    223,703.80 : 308,724.52 = 128,216.65 : x
  2. Step 2: Convert to fraction form
    223,703.80/308,724.52 = 128,216.65/x
  3. Step 3: Cross multiply
    223,703.80x = 308,724.52 × 128,216.65
  4. Step 4: Simplify right side
    223,703.80x = 39,583,623,727.26
  5. Step 5: Solve for x
    x = 39,583,623,727.26/223,703.80
  6. Step 6: Final answer
    x = 176,946.59

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1.5x scale

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.