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Finding the Fourth Proportional to 223,012.79, 307,641.36 and 136,991.15

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Solution

The fourth proportional to 223,012.79, 307,641.36 and 136,991.15 is: 188,976.35

Step by Step Solution

  1. Step 1: Write the proportion equation
    223,012.79 : 307,641.36 = 136,991.15 : x
  2. Step 2: Convert to fraction form
    223,012.79/307,641.36 = 136,991.15/x
  3. Step 3: Cross multiply
    223,012.79x = 307,641.36 × 136,991.15
  4. Step 4: Simplify right side
    223,012.79x = 42,144,144,526.18
  5. Step 5: Solve for x
    x = 42,144,144,526.18/223,012.79
  6. Step 6: Final answer
    x = 188,976.35

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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.