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Finding the Fourth Proportional to 72,031.64, 108,047.48 and 19,441.12

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Solution

The fourth proportional to 72,031.64, 108,047.48 and 19,441.12 is: 29,161.69

Step by Step Solution

  1. Step 1: Write the proportion equation
    72,031.64 : 108,047.48 = 19,441.12 : x
  2. Step 2: Convert to fraction form
    72,031.64/108,047.48 = 19,441.12/x
  3. Step 3: Cross multiply
    72,031.64x = 108,047.48 × 19,441.12
  4. Step 4: Simplify right side
    72,031.64x = 2,100,564,024.38
  5. Step 5: Solve for x
    x = 2,100,564,024.38/72,031.64
  6. Step 6: Final answer
    x = 29,161.69

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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.