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Finding the Fourth Proportional to 101,964.80, 140,707.51 and 56,645.63

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Solution

The fourth proportional to 101,964.80, 140,707.51 and 56,645.63 is: 78,168.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    101,964.80 : 140,707.51 = 56,645.63 : x
  2. Step 2: Convert to fraction form
    101,964.80/140,707.51 = 56,645.63/x
  3. Step 3: Cross multiply
    101,964.80x = 140,707.51 × 56,645.63
  4. Step 4: Simplify right side
    101,964.80x = 7,970,465,549.68
  5. Step 5: Solve for x
    x = 7,970,465,549.68/101,964.80
  6. Step 6: Final answer
    x = 78,168.80

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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.