Home / 112,338.36-154,955.74-85,421.86

Finding the Fourth Proportional to 112,338.36, 154,955.74 and 85,421.86

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Solution

The fourth proportional to 112,338.36, 154,955.74 and 85,421.86 is: 117,828.02

Step by Step Solution

  1. Step 1: Write the proportion equation
    112,338.36 : 154,955.74 = 85,421.86 : x
  2. Step 2: Convert to fraction form
    112,338.36/154,955.74 = 85,421.86/x
  3. Step 3: Cross multiply
    112,338.36x = 154,955.74 × 85,421.86
  4. Step 4: Simplify right side
    112,338.36x = 13,236,606,753.70
  5. Step 5: Solve for x
    x = 13,236,606,753.70/112,338.36
  6. Step 6: Final answer
    x = 117,828.02

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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.