Home / 112,420.64-155,212.82-72,151.76

Finding the Fourth Proportional to 112,420.64, 155,212.82 and 72,151.76

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Solution

The fourth proportional to 112,420.64, 155,212.82 and 72,151.76 is: 99,615.85

Step by Step Solution

  1. Step 1: Write the proportion equation
    112,420.64 : 155,212.82 = 72,151.76 : x
  2. Step 2: Convert to fraction form
    112,420.64/155,212.82 = 72,151.76/x
  3. Step 3: Cross multiply
    112,420.64x = 155,212.82 × 72,151.76
  4. Step 4: Simplify right side
    112,420.64x = 11,198,878,137.56
  5. Step 5: Solve for x
    x = 11,198,878,137.56/112,420.64
  6. Step 6: Final answer
    x = 99,615.85

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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.