Home / 131,747.70-181,689-121,962.08

Finding the Fourth Proportional to 131,747.70, 181,689 and 121,962.08

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Solution

The fourth proportional to 131,747.70, 181,689 and 121,962.08 is: 168,193.97

Step by Step Solution

  1. Step 1: Write the proportion equation
    131,747.70 : 181,689 = 121,962.08 : x
  2. Step 2: Convert to fraction form
    131,747.70/181,689 = 121,962.08/x
  3. Step 3: Cross multiply
    131,747.70x = 181,689 × 121,962.08
  4. Step 4: Simplify right side
    131,747.70x = 22,159,168,353.12
  5. Step 5: Solve for x
    x = 22,159,168,353.12/131,747.70
  6. Step 6: Final answer
    x = 168,193.97

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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.