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Finding the Fourth Proportional to 101,711.60, 140,370.32 and 56,403.80

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Solution

The fourth proportional to 101,711.60, 140,370.32 and 56,403.80 is: 77,841.85

Step by Step Solution

  1. Step 1: Write the proportion equation
    101,711.60 : 140,370.32 = 56,403.80 : x
  2. Step 2: Convert to fraction form
    101,711.60/140,370.32 = 56,403.80/x
  3. Step 3: Cross multiply
    101,711.60x = 140,370.32 × 56,403.80
  4. Step 4: Simplify right side
    101,711.60x = 7,917,419,455.22
  5. Step 5: Solve for x
    x = 7,917,419,455.22/101,711.60
  6. Step 6: Final answer
    x = 77,841.85

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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.