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Finding the Fourth Proportional to 235,734.48, 325,320.48 and 128,311.47

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Solution

The fourth proportional to 235,734.48, 325,320.48 and 128,311.47 is: 177,073.58

Step by Step Solution

  1. Step 1: Write the proportion equation
    235,734.48 : 325,320.48 = 128,311.47 : x
  2. Step 2: Convert to fraction form
    235,734.48/325,320.48 = 128,311.47/x
  3. Step 3: Cross multiply
    235,734.48x = 325,320.48 × 128,311.47
  4. Step 4: Simplify right side
    235,734.48x = 41,742,349,009.91
  5. Step 5: Solve for x
    x = 41,742,349,009.91/235,734.48
  6. Step 6: Final answer
    x = 177,073.58

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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.