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Finding the Fourth Proportional to 221,009.93, 305,030.40 and 130,388.17

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Solution

The fourth proportional to 221,009.93, 305,030.40 and 130,388.17 is: 179,957.32

Step by Step Solution

  1. Step 1: Write the proportion equation
    221,009.93 : 305,030.40 = 130,388.17 : x
  2. Step 2: Convert to fraction form
    221,009.93/305,030.40 = 130,388.17/x
  3. Step 3: Cross multiply
    221,009.93x = 305,030.40 × 130,388.17
  4. Step 4: Simplify right side
    221,009.93x = 39,772,355,650.37
  5. Step 5: Solve for x
    x = 39,772,355,650.37/221,009.93
  6. Step 6: Final answer
    x = 179,957.32

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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.