Home / 77,434.49-115,373.35-72,342.38

Finding the Fourth Proportional to 77,434.49, 115,373.35 and 72,342.38

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Solution

The fourth proportional to 77,434.49, 115,373.35 and 72,342.38 is: 107,786.37

Step by Step Solution

  1. Step 1: Write the proportion equation
    77,434.49 : 115,373.35 = 72,342.38 : x
  2. Step 2: Convert to fraction form
    77,434.49/115,373.35 = 72,342.38/x
  3. Step 3: Cross multiply
    77,434.49x = 115,373.35 × 72,342.38
  4. Step 4: Simplify right side
    77,434.49x = 8,346,382,727.57
  5. Step 5: Solve for x
    x = 8,346,382,727.57/77,434.49
  6. Step 6: Final answer
    x = 107,786.37

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Why These Related Problems?

These problems maintain the same ratio (1.49) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.