Home / 112,963.72-155,763.93-72,621.76

Finding the Fourth Proportional to 112,963.72, 155,763.93 and 72,621.76

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Solution

The fourth proportional to 112,963.72, 155,763.93 and 72,621.76 is: 100,137.02

Step by Step Solution

  1. Step 1: Write the proportion equation
    112,963.72 : 155,763.93 = 72,621.76 : x
  2. Step 2: Convert to fraction form
    112,963.72/155,763.93 = 72,621.76/x
  3. Step 3: Cross multiply
    112,963.72x = 155,763.93 × 72,621.76
  4. Step 4: Simplify right side
    112,963.72x = 11,311,850,741.12
  5. Step 5: Solve for x
    x = 11,311,850,741.12/112,963.72
  6. Step 6: Final answer
    x = 100,137.02

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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.