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Finding the Fourth Proportional to 101,765.40, 140,429.22 and 56,439.09

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Solution

The fourth proportional to 101,765.40, 140,429.22 and 56,439.09 is: 77,882.04

Step by Step Solution

  1. Step 1: Write the proportion equation
    101,765.40 : 140,429.22 = 56,439.09 : x
  2. Step 2: Convert to fraction form
    101,765.40/140,429.22 = 56,439.09/x
  3. Step 3: Cross multiply
    101,765.40x = 140,429.22 × 56,439.09
  4. Step 4: Simplify right side
    101,765.40x = 7,925,697,386.21
  5. Step 5: Solve for x
    x = 7,925,697,386.21/101,765.40
  6. Step 6: Final answer
    x = 77,882.04

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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.