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Finding the Fourth Proportional to 64,961.52, 89,708.81 and 61,423.58

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Solution

The fourth proportional to 64,961.52, 89,708.81 and 61,423.58 is: 84,823.07

Step by Step Solution

  1. Step 1: Write the proportion equation
    64,961.52 : 89,708.81 = 61,423.58 : x
  2. Step 2: Convert to fraction form
    64,961.52/89,708.81 = 61,423.58/x
  3. Step 3: Cross multiply
    64,961.52x = 89,708.81 × 61,423.58
  4. Step 4: Simplify right side
    64,961.52x = 5,510,235,512.08
  5. Step 5: Solve for x
    x = 5,510,235,512.08/64,961.52
  6. Step 6: Final answer
    x = 84,823.07

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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.