Home / 101,029.38-139,393.20-57,421.32

Finding the Fourth Proportional to 101,029.38, 139,393.20 and 57,421.32

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Solution

The fourth proportional to 101,029.38, 139,393.20 and 57,421.32 is: 79,225.88

Step by Step Solution

  1. Step 1: Write the proportion equation
    101,029.38 : 139,393.20 = 57,421.32 : x
  2. Step 2: Convert to fraction form
    101,029.38/139,393.20 = 57,421.32/x
  3. Step 3: Cross multiply
    101,029.38x = 139,393.20 × 57,421.32
  4. Step 4: Simplify right side
    101,029.38x = 8,004,141,543.02
  5. Step 5: Solve for x
    x = 8,004,141,543.02/101,029.38
  6. Step 6: Final answer
    x = 79,225.88

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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.