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Finding the Fourth Proportional to 79,881.63, 110,157.90 and 61,970.10

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Solution

The fourth proportional to 79,881.63, 110,157.90 and 61,970.10 is: 85,457.65

Step by Step Solution

  1. Step 1: Write the proportion equation
    79,881.63 : 110,157.90 = 61,970.10 : x
  2. Step 2: Convert to fraction form
    79,881.63/110,157.90 = 61,970.10/x
  3. Step 3: Cross multiply
    79,881.63x = 110,157.90 × 61,970.10
  4. Step 4: Simplify right side
    79,881.63x = 6,826,496,078.79
  5. Step 5: Solve for x
    x = 6,826,496,078.79/79,881.63
  6. Step 6: Final answer
    x = 85,457.65

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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.