Home / 78,988.14-109,003.85-43,178.58

Finding the Fourth Proportional to 78,988.14, 109,003.85 and 43,178.58

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Solution

The fourth proportional to 78,988.14, 109,003.85 and 43,178.58 is: 59,586.56

Step by Step Solution

  1. Step 1: Write the proportion equation
    78,988.14 : 109,003.85 = 43,178.58 : x
  2. Step 2: Convert to fraction form
    78,988.14/109,003.85 = 43,178.58/x
  3. Step 3: Cross multiply
    78,988.14x = 109,003.85 × 43,178.58
  4. Step 4: Simplify right side
    78,988.14x = 4,706,631,457.53
  5. Step 5: Solve for x
    x = 4,706,631,457.53/78,988.14
  6. Step 6: Final answer
    x = 59,586.56

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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.