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Finding the Fourth Proportional to 72,103.78, 108,079.08 and 42,535.54

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Solution

The fourth proportional to 72,103.78, 108,079.08 and 42,535.54 is: 63,758.13

Step by Step Solution

  1. Step 1: Write the proportion equation
    72,103.78 : 108,079.08 = 42,535.54 : x
  2. Step 2: Convert to fraction form
    72,103.78/108,079.08 = 42,535.54/x
  3. Step 3: Cross multiply
    72,103.78x = 108,079.08 × 42,535.54
  4. Step 4: Simplify right side
    72,103.78x = 4,597,202,030.50
  5. Step 5: Solve for x
    x = 4,597,202,030.50/72,103.78
  6. Step 6: Final answer
    x = 63,758.13

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.