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Finding the Fourth Proportional to 72,693.72, 100,316.88 and 40,862.88

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Solution

The fourth proportional to 72,693.72, 100,316.88 and 40,862.88 is: 56,390.52

Step by Step Solution

  1. Step 1: Write the proportion equation
    72,693.72 : 100,316.88 = 40,862.88 : x
  2. Step 2: Convert to fraction form
    72,693.72/100,316.88 = 40,862.88/x
  3. Step 3: Cross multiply
    72,693.72x = 100,316.88 × 40,862.88
  4. Step 4: Simplify right side
    72,693.72x = 4,099,236,629.41
  5. Step 5: Solve for x
    x = 4,099,236,629.41/72,693.72
  6. Step 6: Final answer
    x = 56,390.52

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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.