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Finding the Fourth Proportional to 235,489.65, 324,978.99 and 128,061.36

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Solution

The fourth proportional to 235,489.65, 324,978.99 and 128,061.36 is: 176,726.46

Step by Step Solution

  1. Step 1: Write the proportion equation
    235,489.65 : 324,978.99 = 128,061.36 : x
  2. Step 2: Convert to fraction form
    235,489.65/324,978.99 = 128,061.36/x
  3. Step 3: Cross multiply
    235,489.65x = 324,978.99 × 128,061.36
  4. Step 4: Simplify right side
    235,489.65x = 41,617,251,430.83
  5. Step 5: Solve for x
    x = 41,617,251,430.83/235,489.65
  6. Step 6: Final answer
    x = 176,726.46

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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.