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Finding the Fourth Proportional to 72,580.32, 100,123.20 and 45,672.48

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Solution

The fourth proportional to 72,580.32, 100,123.20 and 45,672.48 is: 63,004.34

Step by Step Solution

  1. Step 1: Write the proportion equation
    72,580.32 : 100,123.20 = 45,672.48 : x
  2. Step 2: Convert to fraction form
    72,580.32/100,123.20 = 45,672.48/x
  3. Step 3: Cross multiply
    72,580.32x = 100,123.20 × 45,672.48
  4. Step 4: Simplify right side
    72,580.32x = 4,572,874,849.54
  5. Step 5: Solve for x
    x = 4,572,874,849.54/72,580.32
  6. Step 6: Final answer
    x = 63,004.34

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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.