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Finding the Fourth Proportional to 72,753.36, 100,393.65 and 40,916.40

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Solution

The fourth proportional to 72,753.36, 100,393.65 and 40,916.40 is: 56,461.27

Step by Step Solution

  1. Step 1: Write the proportion equation
    72,753.36 : 100,393.65 = 40,916.40 : x
  2. Step 2: Convert to fraction form
    72,753.36/100,393.65 = 40,916.40/x
  3. Step 3: Cross multiply
    72,753.36x = 100,393.65 × 40,916.40
  4. Step 4: Simplify right side
    72,753.36x = 4,107,746,740.86
  5. Step 5: Solve for x
    x = 4,107,746,740.86/72,753.36
  6. Step 6: Final answer
    x = 56,461.27

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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.