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Finding the Fourth Proportional to 72,771.72, 100,409.80 and 42,551.16

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Solution

The fourth proportional to 72,771.72, 100,409.80 and 42,551.16 is: 58,711.73

Step by Step Solution

  1. Step 1: Write the proportion equation
    72,771.72 : 100,409.80 = 42,551.16 : x
  2. Step 2: Convert to fraction form
    72,771.72/100,409.80 = 42,551.16/x
  3. Step 3: Cross multiply
    72,771.72x = 100,409.80 × 42,551.16
  4. Step 4: Simplify right side
    72,771.72x = 4,272,553,465.37
  5. Step 5: Solve for x
    x = 4,272,553,465.37/72,771.72
  6. Step 6: Final answer
    x = 58,711.73

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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.