Home / 112,115.86-154,719.75-61,128.58

Finding the Fourth Proportional to 112,115.86, 154,719.75 and 61,128.58

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Solution

The fourth proportional to 112,115.86, 154,719.75 and 61,128.58 is: 84,357.37

Step by Step Solution

  1. Step 1: Write the proportion equation
    112,115.86 : 154,719.75 = 61,128.58 : x
  2. Step 2: Convert to fraction form
    112,115.86/154,719.75 = 61,128.58/x
  3. Step 3: Cross multiply
    112,115.86x = 154,719.75 × 61,128.58
  4. Step 4: Simplify right side
    112,115.86x = 9,457,798,615.46
  5. Step 5: Solve for x
    x = 9,457,798,615.46/112,115.86
  6. Step 6: Final answer
    x = 84,357.37

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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.