Home / 78,187.52-117,281.23-31,429.46

Finding the Fourth Proportional to 78,187.52, 117,281.23 and 31,429.46

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Solution

The fourth proportional to 78,187.52, 117,281.23 and 31,429.46 is: 47,144.17

Step by Step Solution

  1. Step 1: Write the proportion equation
    78,187.52 : 117,281.23 = 31,429.46 : x
  2. Step 2: Convert to fraction form
    78,187.52/117,281.23 = 31,429.46/x
  3. Step 3: Cross multiply
    78,187.52x = 117,281.23 × 31,429.46
  4. Step 4: Simplify right side
    78,187.52x = 3,686,085,727.04
  5. Step 5: Solve for x
    x = 3,686,085,727.04/78,187.52
  6. Step 6: Final answer
    x = 47,144.17

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.