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Finding the Fourth Proportional to 72,765.72, 100,443.24 and 45,925.74

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Solution

The fourth proportional to 72,765.72, 100,443.24 and 45,925.74 is: 63,394.28

Step by Step Solution

  1. Step 1: Write the proportion equation
    72,765.72 : 100,443.24 = 45,925.74 : x
  2. Step 2: Convert to fraction form
    72,765.72/100,443.24 = 45,925.74/x
  3. Step 3: Cross multiply
    72,765.72x = 100,443.24 × 45,925.74
  4. Step 4: Simplify right side
    72,765.72x = 4,612,930,125.00
  5. Step 5: Solve for x
    x = 4,612,930,125.00/72,765.72
  6. Step 6: Final answer
    x = 63,394.28

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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.