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Finding the Fourth Proportional to 72,011.80, 99,429.42 and 43,755.40

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Solution

The fourth proportional to 72,011.80, 99,429.42 and 43,755.40 is: 60,414.74

Step by Step Solution

  1. Step 1: Write the proportion equation
    72,011.80 : 99,429.42 = 43,755.40 : x
  2. Step 2: Convert to fraction form
    72,011.80/99,429.42 = 43,755.40/x
  3. Step 3: Cross multiply
    72,011.80x = 99,429.42 × 43,755.40
  4. Step 4: Simplify right side
    72,011.80x = 4,350,574,043.87
  5. Step 5: Solve for x
    x = 4,350,574,043.87/72,011.80
  6. Step 6: Final answer
    x = 60,414.74

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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.