Home / 112,121.30-154,688.57-71,857.25

Finding the Fourth Proportional to 112,121.30, 154,688.57 and 71,857.25

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Solution

The fourth proportional to 112,121.30, 154,688.57 and 71,857.25 is: 99,138.13

Step by Step Solution

  1. Step 1: Write the proportion equation
    112,121.30 : 154,688.57 = 71,857.25 : x
  2. Step 2: Convert to fraction form
    112,121.30/154,688.57 = 71,857.25/x
  3. Step 3: Cross multiply
    112,121.30x = 154,688.57 × 71,857.25
  4. Step 4: Simplify right side
    112,121.30x = 11,115,495,813.00
  5. Step 5: Solve for x
    x = 11,115,495,813.00/112,121.30
  6. Step 6: Final answer
    x = 99,138.13

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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.