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Finding the Fourth Proportional to 100,710.15, 138,969.11 and 58,260.75

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Solution

The fourth proportional to 100,710.15, 138,969.11 and 58,260.75 is: 80,393.53

Step by Step Solution

  1. Step 1: Write the proportion equation
    100,710.15 : 138,969.11 = 58,260.75 : x
  2. Step 2: Convert to fraction form
    100,710.15/138,969.11 = 58,260.75/x
  3. Step 3: Cross multiply
    100,710.15x = 138,969.11 × 58,260.75
  4. Step 4: Simplify right side
    100,710.15x = 8,096,444,721.08
  5. Step 5: Solve for x
    x = 8,096,444,721.08/100,710.15
  6. Step 6: Final answer
    x = 80,393.53

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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.