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Finding the Fourth Proportional to 72,669.98, 100,222.12 and 47,151.20

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Solution

The fourth proportional to 72,669.98, 100,222.12 and 47,151.20 is: 65,028.13

Step by Step Solution

  1. Step 1: Write the proportion equation
    72,669.98 : 100,222.12 = 47,151.20 : x
  2. Step 2: Convert to fraction form
    72,669.98/100,222.12 = 47,151.20/x
  3. Step 3: Cross multiply
    72,669.98x = 100,222.12 × 47,151.20
  4. Step 4: Simplify right side
    72,669.98x = 4,725,592,487.68
  5. Step 5: Solve for x
    x = 4,725,592,487.68/72,669.98
  6. Step 6: Final answer
    x = 65,028.13

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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.