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Finding the Fourth Proportional to 131,398.56, 181,330.08 and 71,782.56

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Solution

The fourth proportional to 131,398.56, 181,330.08 and 71,782.56 is: 99,059.97

Step by Step Solution

  1. Step 1: Write the proportion equation
    131,398.56 : 181,330.08 = 71,782.56 : x
  2. Step 2: Convert to fraction form
    131,398.56/181,330.08 = 71,782.56/x
  3. Step 3: Cross multiply
    131,398.56x = 181,330.08 × 71,782.56
  4. Step 4: Simplify right side
    131,398.56x = 13,016,337,347.40
  5. Step 5: Solve for x
    x = 13,016,337,347.40/131,398.56
  6. Step 6: Final answer
    x = 99,059.97

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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.