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Finding the Fourth Proportional to 145,263.86, 200,472.69 and 109,390.58

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Solution

The fourth proportional to 145,263.86, 200,472.69 and 109,390.58 is: 150,965.45

Step by Step Solution

  1. Step 1: Write the proportion equation
    145,263.86 : 200,472.69 = 109,390.58 : x
  2. Step 2: Convert to fraction form
    145,263.86/200,472.69 = 109,390.58/x
  3. Step 3: Cross multiply
    145,263.86x = 200,472.69 × 109,390.58
  4. Step 4: Simplify right side
    145,263.86x = 21,929,823,833.26
  5. Step 5: Solve for x
    x = 21,929,823,833.26/145,263.86
  6. Step 6: Final answer
    x = 150,965.45

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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.