Home / 79,128.67-109,210.24-45,148.21

Finding the Fourth Proportional to 79,128.67, 109,210.24 and 45,148.21

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Solution

The fourth proportional to 79,128.67, 109,210.24 and 45,148.21 is: 62,311.76

Step by Step Solution

  1. Step 1: Write the proportion equation
    79,128.67 : 109,210.24 = 45,148.21 : x
  2. Step 2: Convert to fraction form
    79,128.67/109,210.24 = 45,148.21/x
  3. Step 3: Cross multiply
    79,128.67x = 109,210.24 × 45,148.21
  4. Step 4: Simplify right side
    79,128.67x = 4,930,646,463.77
  5. Step 5: Solve for x
    x = 4,930,646,463.77/79,128.67
  6. Step 6: Final answer
    x = 62,311.76

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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.