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Finding the Fourth Proportional to 235,776.61, 325,371.75 and 128,347.46

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Solution

The fourth proportional to 235,776.61, 325,371.75 and 128,347.46 is: 177,119.51

Step by Step Solution

  1. Step 1: Write the proportion equation
    235,776.61 : 325,371.75 = 128,347.46 : x
  2. Step 2: Convert to fraction form
    235,776.61/325,371.75 = 128,347.46/x
  3. Step 3: Cross multiply
    235,776.61x = 325,371.75 × 128,347.46
  4. Step 4: Simplify right side
    235,776.61x = 41,760,636,041.40
  5. Step 5: Solve for x
    x = 41,760,636,041.40/235,776.61
  6. Step 6: Final answer
    x = 177,119.51

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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.