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Finding the Fourth Proportional to 180,721.80, 249,384.80 and 100,144.62

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Solution

The fourth proportional to 180,721.80, 249,384.80 and 100,144.62 is: 138,193.32

Step by Step Solution

  1. Step 1: Write the proportion equation
    180,721.80 : 249,384.80 = 100,144.62 : x
  2. Step 2: Convert to fraction form
    180,721.80/249,384.80 = 100,144.62/x
  3. Step 3: Cross multiply
    180,721.80x = 249,384.80 × 100,144.62
  4. Step 4: Simplify right side
    180,721.80x = 24,974,546,029.78
  5. Step 5: Solve for x
    x = 24,974,546,029.78/180,721.80
  6. Step 6: Final answer
    x = 138,193.32

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1.5x scale

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.