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Finding the Fourth Proportional to 64,955.81, 97,436.57 and 20,585.84

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Solution

The fourth proportional to 64,955.81, 97,436.57 and 20,585.84 is: 30,879.65

Step by Step Solution

  1. Step 1: Write the proportion equation
    64,955.81 : 97,436.57 = 20,585.84 : x
  2. Step 2: Convert to fraction form
    64,955.81/97,436.57 = 20,585.84/x
  3. Step 3: Cross multiply
    64,955.81x = 97,436.57 × 20,585.84
  4. Step 4: Simplify right side
    64,955.81x = 2,005,813,050.06
  5. Step 5: Solve for x
    x = 2,005,813,050.06/64,955.81
  6. Step 6: Final answer
    x = 30,879.65

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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.