Home / 142,985.28-197,310.24-79,320.96

Finding the Fourth Proportional to 142,985.28, 197,310.24 and 79,320.96

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Solution

The fourth proportional to 142,985.28, 197,310.24 and 79,320.96 is: 109,457.68

Step by Step Solution

  1. Step 1: Write the proportion equation
    142,985.28 : 197,310.24 = 79,320.96 : x
  2. Step 2: Convert to fraction form
    142,985.28/197,310.24 = 79,320.96/x
  3. Step 3: Cross multiply
    142,985.28x = 197,310.24 × 79,320.96
  4. Step 4: Simplify right side
    142,985.28x = 15,650,837,654.63
  5. Step 5: Solve for x
    x = 15,650,837,654.63/142,985.28
  6. Step 6: Final answer
    x = 109,457.68

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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.