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Finding the Fourth Proportional to 72,979.03, 100,711.02 and 39,445.03

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Solution

The fourth proportional to 72,979.03, 100,711.02 and 39,445.03 is: 54,434.12

Step by Step Solution

  1. Step 1: Write the proportion equation
    72,979.03 : 100,711.02 = 39,445.03 : x
  2. Step 2: Convert to fraction form
    72,979.03/100,711.02 = 39,445.03/x
  3. Step 3: Cross multiply
    72,979.03x = 100,711.02 × 39,445.03
  4. Step 4: Simplify right side
    72,979.03x = 3,972,549,205.23
  5. Step 5: Solve for x
    x = 3,972,549,205.23/72,979.03
  6. Step 6: Final answer
    x = 54,434.12

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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.