Home / 111,345.14-153,450.21-79,081.16

Finding the Fourth Proportional to 111,345.14, 153,450.21 and 79,081.16

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Solution

The fourth proportional to 111,345.14, 153,450.21 and 79,081.16 is: 108,985.63

Step by Step Solution

  1. Step 1: Write the proportion equation
    111,345.14 : 153,450.21 = 79,081.16 : x
  2. Step 2: Convert to fraction form
    111,345.14/153,450.21 = 79,081.16/x
  3. Step 3: Cross multiply
    111,345.14x = 153,450.21 × 79,081.16
  4. Step 4: Simplify right side
    111,345.14x = 12,135,019,841.79
  5. Step 5: Solve for x
    x = 12,135,019,841.79/111,345.14
  6. Step 6: Final answer
    x = 108,985.63

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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.