Home / 111,521.89-167,283.08-78,390.21

Finding the Fourth Proportional to 111,521.89, 167,283.08 and 78,390.21

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Solution

The fourth proportional to 111,521.89, 167,283.08 and 78,390.21 is: 117,585.49

Step by Step Solution

  1. Step 1: Write the proportion equation
    111,521.89 : 167,283.08 = 78,390.21 : x
  2. Step 2: Convert to fraction form
    111,521.89/167,283.08 = 78,390.21/x
  3. Step 3: Cross multiply
    111,521.89x = 167,283.08 × 78,390.21
  4. Step 4: Simplify right side
    111,521.89x = 13,113,356,299.97
  5. Step 5: Solve for x
    x = 13,113,356,299.97/111,521.89
  6. Step 6: Final answer
    x = 117,585.49

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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.