Home / 135,678.16-187,247.68-79,088.32

Finding the Fourth Proportional to 135,678.16, 187,247.68 and 79,088.32

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Solution

The fourth proportional to 135,678.16, 187,247.68 and 79,088.32 is: 109,148.77

Step by Step Solution

  1. Step 1: Write the proportion equation
    135,678.16 : 187,247.68 = 79,088.32 : x
  2. Step 2: Convert to fraction form
    135,678.16/187,247.68 = 79,088.32/x
  3. Step 3: Cross multiply
    135,678.16x = 187,247.68 × 79,088.32
  4. Step 4: Simplify right side
    135,678.16x = 14,809,104,435.10
  5. Step 5: Solve for x
    x = 14,809,104,435.10/135,678.16
  6. Step 6: Final answer
    x = 109,148.77

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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.