Home / 109,661.36-151,315.61-61,913.70

Finding the Fourth Proportional to 109,661.36, 151,315.61 and 61,913.70

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Solution

The fourth proportional to 109,661.36, 151,315.61 and 61,913.70 is: 85,431.27

Step by Step Solution

  1. Step 1: Write the proportion equation
    109,661.36 : 151,315.61 = 61,913.70 : x
  2. Step 2: Convert to fraction form
    109,661.36/151,315.61 = 61,913.70/x
  3. Step 3: Cross multiply
    109,661.36x = 151,315.61 × 61,913.70
  4. Step 4: Simplify right side
    109,661.36x = 9,368,508,973.29
  5. Step 5: Solve for x
    x = 9,368,508,973.29/109,661.36
  6. Step 6: Final answer
    x = 85,431.27

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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.