Home / 100,333.31-138,356.64-70,107.62

Finding the Fourth Proportional to 100,333.31, 138,356.64 and 70,107.62

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Solution

The fourth proportional to 100,333.31, 138,356.64 and 70,107.62 is: 96,676.31

Step by Step Solution

  1. Step 1: Write the proportion equation
    100,333.31 : 138,356.64 = 70,107.62 : x
  2. Step 2: Convert to fraction form
    100,333.31/138,356.64 = 70,107.62/x
  3. Step 3: Cross multiply
    100,333.31x = 138,356.64 × 70,107.62
  4. Step 4: Simplify right side
    100,333.31x = 9,699,854,049.81
  5. Step 5: Solve for x
    x = 9,699,854,049.81/100,333.31
  6. Step 6: Final answer
    x = 96,676.31

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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.