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Finding the Fourth Proportional to 101,687.12, 140,337.48 and 61,420.88

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Solution

The fourth proportional to 101,687.12, 140,337.48 and 61,420.88 is: 84,766.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    101,687.12 : 140,337.48 = 61,420.88 : x
  2. Step 2: Convert to fraction form
    101,687.12/140,337.48 = 61,420.88/x
  3. Step 3: Cross multiply
    101,687.12x = 140,337.48 × 61,420.88
  4. Step 4: Simplify right side
    101,687.12x = 8,619,651,518.58
  5. Step 5: Solve for x
    x = 8,619,651,518.58/101,687.12
  6. Step 6: Final answer
    x = 84,766.40

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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.