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Finding the Fourth Proportional to 64,423.40, 88,904.12 and 36,129.69

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Solution

The fourth proportional to 64,423.40, 88,904.12 and 36,129.69 is: 49,858.88

Step by Step Solution

  1. Step 1: Write the proportion equation
    64,423.40 : 88,904.12 = 36,129.69 : x
  2. Step 2: Convert to fraction form
    64,423.40/88,904.12 = 36,129.69/x
  3. Step 3: Cross multiply
    64,423.40x = 88,904.12 × 36,129.69
  4. Step 4: Simplify right side
    64,423.40x = 3,212,078,114.67
  5. Step 5: Solve for x
    x = 3,212,078,114.67/64,423.40
  6. Step 6: Final answer
    x = 49,858.88

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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.