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Finding the Fourth Proportional to 180,963.35, 249,729.71 and 100,390.87

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Solution

The fourth proportional to 180,963.35, 249,729.71 and 100,390.87 is: 138,539.57

Step by Step Solution

  1. Step 1: Write the proportion equation
    180,963.35 : 249,729.71 = 100,390.87 : x
  2. Step 2: Convert to fraction form
    180,963.35/249,729.71 = 100,390.87/x
  3. Step 3: Cross multiply
    180,963.35x = 249,729.71 × 100,390.87
  4. Step 4: Simplify right side
    180,963.35x = 25,070,583,476.07
  5. Step 5: Solve for x
    x = 25,070,583,476.07/180,963.35
  6. Step 6: Final answer
    x = 138,539.57

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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.