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Finding the Fourth Proportional to 101,509.44, 140,066.72 and 56,788.80

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Solution

The fourth proportional to 101,509.44, 140,066.72 and 56,788.80 is: 78,359.42

Step by Step Solution

  1. Step 1: Write the proportion equation
    101,509.44 : 140,066.72 = 56,788.80 : x
  2. Step 2: Convert to fraction form
    101,509.44/140,066.72 = 56,788.80/x
  3. Step 3: Cross multiply
    101,509.44x = 140,066.72 × 56,788.80
  4. Step 4: Simplify right side
    101,509.44x = 7,954,220,948.74
  5. Step 5: Solve for x
    x = 7,954,220,948.74/101,509.44
  6. Step 6: Final answer
    x = 78,359.42

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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.