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Finding the Fourth Proportional to 180,918.87, 249,681.29 and 100,361.63

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Solution

The fourth proportional to 180,918.87, 249,681.29 and 100,361.63 is: 138,506.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    180,918.87 : 249,681.29 = 100,361.63 : x
  2. Step 2: Convert to fraction form
    180,918.87/249,681.29 = 100,361.63/x
  3. Step 3: Cross multiply
    180,918.87x = 249,681.29 × 100,361.63
  4. Step 4: Simplify right side
    180,918.87x = 25,058,421,367.30
  5. Step 5: Solve for x
    x = 25,058,421,367.30/180,918.87
  6. Step 6: Final answer
    x = 138,506.40

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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.