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Finding the Fourth Proportional to 101,715.76, 140,367.49 and 56,392.58

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Solution

The fourth proportional to 101,715.76, 140,367.49 and 56,392.58 is: 77,821.62

Step by Step Solution

  1. Step 1: Write the proportion equation
    101,715.76 : 140,367.49 = 56,392.58 : x
  2. Step 2: Convert to fraction form
    101,715.76/140,367.49 = 56,392.58/x
  3. Step 3: Cross multiply
    101,715.76x = 140,367.49 × 56,392.58
  4. Step 4: Simplify right side
    101,715.76x = 7,915,684,646.80
  5. Step 5: Solve for x
    x = 7,915,684,646.80/101,715.76
  6. Step 6: Final answer
    x = 77,821.62

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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.