Home / 78,426.80-117,642.96-25,120.39

Finding the Fourth Proportional to 78,426.80, 117,642.96 and 25,120.39

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Solution

The fourth proportional to 78,426.80, 117,642.96 and 25,120.39 is: 37,681.47

Step by Step Solution

  1. Step 1: Write the proportion equation
    78,426.80 : 117,642.96 = 25,120.39 : x
  2. Step 2: Convert to fraction form
    78,426.80/117,642.96 = 25,120.39/x
  3. Step 3: Cross multiply
    78,426.80x = 117,642.96 × 25,120.39
  4. Step 4: Simplify right side
    78,426.80x = 2,955,237,088.81
  5. Step 5: Solve for x
    x = 2,955,237,088.81/78,426.80
  6. Step 6: Final answer
    x = 37,681.47

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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.