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Finding the Fourth Proportional to 72,502.64, 100,058.24 and 40,673.60

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Solution

The fourth proportional to 72,502.64, 100,058.24 and 40,673.60 is: 56,132.15

Step by Step Solution

  1. Step 1: Write the proportion equation
    72,502.64 : 100,058.24 = 40,673.60 : x
  2. Step 2: Convert to fraction form
    72,502.64/100,058.24 = 40,673.60/x
  3. Step 3: Cross multiply
    72,502.64x = 100,058.24 × 40,673.60
  4. Step 4: Simplify right side
    72,502.64x = 4,069,728,830.46
  5. Step 5: Solve for x
    x = 4,069,728,830.46/72,502.64
  6. Step 6: Final answer
    x = 56,132.15

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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.