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Finding the Fourth Proportional to 66,718.62, 91,581.37 and 58,995.81

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Solution

The fourth proportional to 66,718.62, 91,581.37 and 58,995.81 is: 80,980.65

Step by Step Solution

  1. Step 1: Write the proportion equation
    66,718.62 : 91,581.37 = 58,995.81 : x
  2. Step 2: Convert to fraction form
    66,718.62/91,581.37 = 58,995.81/x
  3. Step 3: Cross multiply
    66,718.62x = 91,581.37 × 58,995.81
  4. Step 4: Simplify right side
    66,718.62x = 5,402,916,956.57
  5. Step 5: Solve for x
    x = 5,402,916,956.57/66,718.62
  6. Step 6: Final answer
    x = 80,980.65

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Why These Related Problems?

These problems maintain the same ratio (1.37) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.