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Finding the Fourth Proportional to 180,963.28, 249,729.96 and 100,392.40

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Solution

The fourth proportional to 180,963.28, 249,729.96 and 100,392.40 is: 138,541.86

Step by Step Solution

  1. Step 1: Write the proportion equation
    180,963.28 : 249,729.96 = 100,392.40 : x
  2. Step 2: Convert to fraction form
    180,963.28/249,729.96 = 100,392.40/x
  3. Step 3: Cross multiply
    180,963.28x = 249,729.96 × 100,392.40
  4. Step 4: Simplify right side
    180,963.28x = 25,070,990,036.30
  5. Step 5: Solve for x
    x = 25,070,990,036.30/180,963.28
  6. Step 6: Final answer
    x = 138,541.86

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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.