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Finding the Fourth Proportional to 215,390.34, 323,129.25 and 89,041.88

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Solution

The fourth proportional to 215,390.34, 323,129.25 and 89,041.88 is: 133,580.91

Step by Step Solution

  1. Step 1: Write the proportion equation
    215,390.34 : 323,129.25 = 89,041.88 : x
  2. Step 2: Convert to fraction form
    215,390.34/323,129.25 = 89,041.88/x
  3. Step 3: Cross multiply
    215,390.34x = 323,129.25 × 89,041.88
  4. Step 4: Simplify right side
    215,390.34x = 28,772,036,710.81
  5. Step 5: Solve for x
    x = 28,772,036,710.81/215,390.34
  6. Step 6: Final answer
    x = 133,580.91

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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.