Home / 78,118.28-107,803.66-42,308.36

Finding the Fourth Proportional to 78,118.28, 107,803.66 and 42,308.36

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Solution

The fourth proportional to 78,118.28, 107,803.66 and 42,308.36 is: 58,385.77

Step by Step Solution

  1. Step 1: Write the proportion equation
    78,118.28 : 107,803.66 = 42,308.36 : x
  2. Step 2: Convert to fraction form
    78,118.28/107,803.66 = 42,308.36/x
  3. Step 3: Cross multiply
    78,118.28x = 107,803.66 × 42,308.36
  4. Step 4: Simplify right side
    78,118.28x = 4,560,996,056.60
  5. Step 5: Solve for x
    x = 4,560,996,056.60/78,118.28
  6. Step 6: Final answer
    x = 58,385.77

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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.