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Finding the Fourth Proportional to 78,882.66, 108,857.64 and 43,072.69

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Solution

The fourth proportional to 78,882.66, 108,857.64 and 43,072.69 is: 59,440.08

Step by Step Solution

  1. Step 1: Write the proportion equation
    78,882.66 : 108,857.64 = 43,072.69 : x
  2. Step 2: Convert to fraction form
    78,882.66/108,857.64 = 43,072.69/x
  3. Step 3: Cross multiply
    78,882.66x = 108,857.64 × 43,072.69
  4. Step 4: Simplify right side
    78,882.66x = 4,688,791,381.85
  5. Step 5: Solve for x
    x = 4,688,791,381.85/78,882.66
  6. Step 6: Final answer
    x = 59,440.08

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1.5x scale

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.