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Finding the Fourth Proportional to 72,038.10, 108,048.65 and 19,451.69

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Solution

The fourth proportional to 72,038.10, 108,048.65 and 19,451.69 is: 29,175.23

Step by Step Solution

  1. Step 1: Write the proportion equation
    72,038.10 : 108,048.65 = 19,451.69 : x
  2. Step 2: Convert to fraction form
    72,038.10/108,048.65 = 19,451.69/x
  3. Step 3: Cross multiply
    72,038.10x = 108,048.65 × 19,451.69
  4. Step 4: Simplify right side
    72,038.10x = 2,101,728,207.22
  5. Step 5: Solve for x
    x = 2,101,728,207.22/72,038.10
  6. Step 6: Final answer
    x = 29,175.23

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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.