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Finding the Fourth Proportional to 180,939.52, 249,700.54 and 100,364.42

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Solution

The fourth proportional to 180,939.52, 249,700.54 and 100,364.42 is: 138,505.12

Step by Step Solution

  1. Step 1: Write the proportion equation
    180,939.52 : 249,700.54 = 100,364.42 : x
  2. Step 2: Convert to fraction form
    180,939.52/249,700.54 = 100,364.42/x
  3. Step 3: Cross multiply
    180,939.52x = 249,700.54 × 100,364.42
  4. Step 4: Simplify right side
    180,939.52x = 25,061,049,870.79
  5. Step 5: Solve for x
    x = 25,061,049,870.79/180,939.52
  6. Step 6: Final answer
    x = 138,505.12

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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.