Home / 113,911.20-157,264.60-78,153.75

Finding the Fourth Proportional to 113,911.20, 157,264.60 and 78,153.75

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Solution

The fourth proportional to 113,911.20, 157,264.60 and 78,153.75 is: 107,898.24

Step by Step Solution

  1. Step 1: Write the proportion equation
    113,911.20 : 157,264.60 = 78,153.75 : x
  2. Step 2: Convert to fraction form
    113,911.20/157,264.60 = 78,153.75/x
  3. Step 3: Cross multiply
    113,911.20x = 157,264.60 × 78,153.75
  4. Step 4: Simplify right side
    113,911.20x = 12,290,818,232.25
  5. Step 5: Solve for x
    x = 12,290,818,232.25/113,911.20
  6. Step 6: Final answer
    x = 107,898.24

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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.