Home / 134,421.21-185,493.11-77,821.65

Finding the Fourth Proportional to 134,421.21, 185,493.11 and 77,821.65

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Solution

The fourth proportional to 134,421.21, 185,493.11 and 77,821.65 is: 107,389.15

Step by Step Solution

  1. Step 1: Write the proportion equation
    134,421.21 : 185,493.11 = 77,821.65 : x
  2. Step 2: Convert to fraction form
    134,421.21/185,493.11 = 77,821.65/x
  3. Step 3: Cross multiply
    134,421.21x = 185,493.11 × 77,821.65
  4. Step 4: Simplify right side
    134,421.21x = 14,435,379,494.72
  5. Step 5: Solve for x
    x = 14,435,379,494.72/134,421.21
  6. Step 6: Final answer
    x = 107,389.15

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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.