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Finding the Fourth Proportional to 78,953.92, 108,956.28 and 43,143.94

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Solution

The fourth proportional to 78,953.92, 108,956.28 and 43,143.94 is: 59,538.57

Step by Step Solution

  1. Step 1: Write the proportion equation
    78,953.92 : 108,956.28 = 43,143.94 : x
  2. Step 2: Convert to fraction form
    78,953.92/108,956.28 = 43,143.94/x
  3. Step 3: Cross multiply
    78,953.92x = 108,956.28 × 43,143.94
  4. Step 4: Simplify right side
    78,953.92x = 4,700,803,206.94
  5. Step 5: Solve for x
    x = 4,700,803,206.94/78,953.92
  6. Step 6: Final answer
    x = 59,538.57

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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.