Home / 78,581.88-117,869.63-19,416.06

Finding the Fourth Proportional to 78,581.88, 117,869.63 and 19,416.06

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Solution

The fourth proportional to 78,581.88, 117,869.63 and 19,416.06 is: 29,123.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    78,581.88 : 117,869.63 = 19,416.06 : x
  2. Step 2: Convert to fraction form
    78,581.88/117,869.63 = 19,416.06/x
  3. Step 3: Cross multiply
    78,581.88x = 117,869.63 × 19,416.06
  4. Step 4: Simplify right side
    78,581.88x = 2,288,563,711.18
  5. Step 5: Solve for x
    x = 2,288,563,711.18/78,581.88
  6. Step 6: Final answer
    x = 29,123.30

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.