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Finding the Fourth Proportional to 223,707.80, 308,730.04 and 128,220.66

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Solution

The fourth proportional to 223,707.80, 308,730.04 and 128,220.66 is: 176,952.12

Step by Step Solution

  1. Step 1: Write the proportion equation
    223,707.80 : 308,730.04 = 128,220.66 : x
  2. Step 2: Convert to fraction form
    223,707.80/308,730.04 = 128,220.66/x
  3. Step 3: Cross multiply
    223,707.80x = 308,730.04 × 128,220.66
  4. Step 4: Simplify right side
    223,707.80x = 39,585,569,490.63
  5. Step 5: Solve for x
    x = 39,585,569,490.63/223,707.80
  6. Step 6: Final answer
    x = 176,952.12

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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.