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Finding the Fourth Proportional to 101,029.65, 139,421.90 and 55,709.24

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Solution

The fourth proportional to 101,029.65, 139,421.90 and 55,709.24 is: 76,879.29

Step by Step Solution

  1. Step 1: Write the proportion equation
    101,029.65 : 139,421.90 = 55,709.24 : x
  2. Step 2: Convert to fraction form
    101,029.65/139,421.90 = 55,709.24/x
  3. Step 3: Cross multiply
    101,029.65x = 139,421.90 × 55,709.24
  4. Step 4: Simplify right side
    101,029.65x = 7,767,088,315.19
  5. Step 5: Solve for x
    x = 7,767,088,315.19/101,029.65
  6. Step 6: Final answer
    x = 76,879.29

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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.