Home / 113,991.30-157,347.36-78,299.46

Finding the Fourth Proportional to 113,991.30, 157,347.36 and 78,299.46

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Solution

The fourth proportional to 113,991.30, 157,347.36 and 78,299.46 is: 108,080.29

Step by Step Solution

  1. Step 1: Write the proportion equation
    113,991.30 : 157,347.36 = 78,299.46 : x
  2. Step 2: Convert to fraction form
    113,991.30/157,347.36 = 78,299.46/x
  3. Step 3: Cross multiply
    113,991.30x = 157,347.36 × 78,299.46
  4. Step 4: Simplify right side
    113,991.30x = 12,320,213,320.43
  5. Step 5: Solve for x
    x = 12,320,213,320.43/113,991.30
  6. Step 6: Final answer
    x = 108,080.29

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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.