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Finding the Fourth Proportional to 72,281.35, 99,746.12 and 40,017.41

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Solution

The fourth proportional to 72,281.35, 99,746.12 and 40,017.41 is: 55,222.83

Step by Step Solution

  1. Step 1: Write the proportion equation
    72,281.35 : 99,746.12 = 40,017.41 : x
  2. Step 2: Convert to fraction form
    72,281.35/99,746.12 = 40,017.41/x
  3. Step 3: Cross multiply
    72,281.35x = 99,746.12 × 40,017.41
  4. Step 4: Simplify right side
    72,281.35x = 3,991,580,881.22
  5. Step 5: Solve for x
    x = 3,991,580,881.22/72,281.35
  6. Step 6: Final answer
    x = 55,222.83

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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.