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Finding the Fourth Proportional to 235,864.28, 325,492.81 and 128,434.28

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Solution

The fourth proportional to 235,864.28, 325,492.81 and 128,434.28 is: 177,239.35

Step by Step Solution

  1. Step 1: Write the proportion equation
    235,864.28 : 325,492.81 = 128,434.28 : x
  2. Step 2: Convert to fraction form
    235,864.28/325,492.81 = 128,434.28/x
  3. Step 3: Cross multiply
    235,864.28x = 325,492.81 × 128,434.28
  4. Step 4: Simplify right side
    235,864.28x = 41,804,432,748.98
  5. Step 5: Solve for x
    x = 41,804,432,748.98/235,864.28
  6. Step 6: Final answer
    x = 177,239.35

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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.