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Finding the Fourth Proportional to 180,661.69, 249,309.75 and 100,087.45

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Solution

The fourth proportional to 180,661.69, 249,309.75 and 100,087.45 is: 138,118.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    180,661.69 : 249,309.75 = 100,087.45 : x
  2. Step 2: Convert to fraction form
    180,661.69/249,309.75 = 100,087.45/x
  3. Step 3: Cross multiply
    180,661.69x = 249,309.75 × 100,087.45
  4. Step 4: Simplify right side
    180,661.69x = 24,952,776,326.70
  5. Step 5: Solve for x
    x = 24,952,776,326.70/180,661.69
  6. Step 6: Final answer
    x = 138,118.80

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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.