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Finding the Fourth Proportional to 117,007.70, 161,438.55 and 74,531.30

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Solution

The fourth proportional to 117,007.70, 161,438.55 and 74,531.30 is: 102,832.76

Step by Step Solution

  1. Step 1: Write the proportion equation
    117,007.70 : 161,438.55 = 74,531.30 : x
  2. Step 2: Convert to fraction form
    117,007.70/161,438.55 = 74,531.30/x
  3. Step 3: Cross multiply
    117,007.70x = 161,438.55 × 74,531.30
  4. Step 4: Simplify right side
    117,007.70x = 12,032,225,001.62
  5. Step 5: Solve for x
    x = 12,032,225,001.62/117,007.70
  6. Step 6: Final answer
    x = 102,832.76

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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.