Home / 180,720.29-249,382.72-100,143.11

Finding the Fourth Proportional to 180,720.29, 249,382.72 and 100,143.11

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Solution

The fourth proportional to 180,720.29, 249,382.72 and 100,143.11 is: 138,191.24

Step by Step Solution

  1. Step 1: Write the proportion equation
    180,720.29 : 249,382.72 = 100,143.11 : x
  2. Step 2: Convert to fraction form
    180,720.29/249,382.72 = 100,143.11/x
  3. Step 3: Cross multiply
    180,720.29x = 249,382.72 × 100,143.11
  4. Step 4: Simplify right side
    180,720.29x = 24,973,961,161.06
  5. Step 5: Solve for x
    x = 24,973,961,161.06/180,720.29
  6. Step 6: Final answer
    x = 138,191.24

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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.