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Finding the Fourth Proportional to 117,301.38, 161,747.51 and 87,142.65

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Solution

The fourth proportional to 117,301.38, 161,747.51 and 87,142.65 is: 120,161.47

Step by Step Solution

  1. Step 1: Write the proportion equation
    117,301.38 : 161,747.51 = 87,142.65 : x
  2. Step 2: Convert to fraction form
    117,301.38/161,747.51 = 87,142.65/x
  3. Step 3: Cross multiply
    117,301.38x = 161,747.51 × 87,142.65
  4. Step 4: Simplify right side
    117,301.38x = 14,095,106,216.59
  5. Step 5: Solve for x
    x = 14,095,106,216.59/117,301.38
  6. Step 6: Final answer
    x = 120,161.47

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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.