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Finding the Fourth Proportional to 229,395.50, 316,565.79 and 128,795.66

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Solution

The fourth proportional to 229,395.50, 316,565.79 and 128,795.66 is: 177,738.01

Step by Step Solution

  1. Step 1: Write the proportion equation
    229,395.50 : 316,565.79 = 128,795.66 : x
  2. Step 2: Convert to fraction form
    229,395.50/316,565.79 = 128,795.66/x
  3. Step 3: Cross multiply
    229,395.50x = 316,565.79 × 128,795.66
  4. Step 4: Simplify right side
    229,395.50x = 40,772,299,856.47
  5. Step 5: Solve for x
    x = 40,772,299,856.47/229,395.50
  6. Step 6: Final answer
    x = 177,738.01

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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.