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Finding the Fourth Proportional to 142,969.17, 197,321.11 and 79,327.47

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Solution

The fourth proportional to 142,969.17, 197,321.11 and 79,327.47 is: 109,485.04

Step by Step Solution

  1. Step 1: Write the proportion equation
    142,969.17 : 197,321.11 = 79,327.47 : x
  2. Step 2: Convert to fraction form
    142,969.17/197,321.11 = 79,327.47/x
  3. Step 3: Cross multiply
    142,969.17x = 197,321.11 × 79,327.47
  4. Step 4: Simplify right side
    142,969.17x = 15,652,985,421.74
  5. Step 5: Solve for x
    x = 15,652,985,421.74/142,969.17
  6. Step 6: Final answer
    x = 109,485.04

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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.