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Finding the Fourth Proportional to 228,856.76, 343,238.21 and 86,652.98

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Solution

The fourth proportional to 228,856.76, 343,238.21 and 86,652.98 is: 129,961.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    228,856.76 : 343,238.21 = 86,652.98 : x
  2. Step 2: Convert to fraction form
    228,856.76/343,238.21 = 86,652.98/x
  3. Step 3: Cross multiply
    228,856.76x = 343,238.21 × 86,652.98
  4. Step 4: Simplify right side
    228,856.76x = 29,742,613,209.00
  5. Step 5: Solve for x
    x = 29,742,613,209.00/228,856.76
  6. Step 6: Final answer
    x = 129,961.70

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.