Home / 121,558.34-167,549.72-81,257.40

Finding the Fourth Proportional to 121,558.34, 167,549.72 and 81,257.40

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Solution

The fourth proportional to 121,558.34, 167,549.72 and 81,257.40 is: 112,000.99

Step by Step Solution

  1. Step 1: Write the proportion equation
    121,558.34 : 167,549.72 = 81,257.40 : x
  2. Step 2: Convert to fraction form
    121,558.34/167,549.72 = 81,257.40/x
  3. Step 3: Cross multiply
    121,558.34x = 167,549.72 × 81,257.40
  4. Step 4: Simplify right side
    121,558.34x = 13,614,654,617.93
  5. Step 5: Solve for x
    x = 13,614,654,617.93/121,558.34
  6. Step 6: Final answer
    x = 112,000.99

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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.