Home / 111,943.49-167,739.35-78,176.21

Finding the Fourth Proportional to 111,943.49, 167,739.35 and 78,176.21

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Solution

The fourth proportional to 111,943.49, 167,739.35 and 78,176.21 is: 117,141.48

Step by Step Solution

  1. Step 1: Write the proportion equation
    111,943.49 : 167,739.35 = 78,176.21 : x
  2. Step 2: Convert to fraction form
    111,943.49/167,739.35 = 78,176.21/x
  3. Step 3: Cross multiply
    111,943.49x = 167,739.35 × 78,176.21
  4. Step 4: Simplify right side
    111,943.49x = 13,113,225,421.29
  5. Step 5: Solve for x
    x = 13,113,225,421.29/111,943.49
  6. Step 6: Final answer
    x = 117,141.48

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.