Home / 113,130.25-155,991.80-72,240.61

Finding the Fourth Proportional to 113,130.25, 155,991.80 and 72,240.61

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Solution

The fourth proportional to 113,130.25, 155,991.80 and 72,240.61 is: 99,610.34

Step by Step Solution

  1. Step 1: Write the proportion equation
    113,130.25 : 155,991.80 = 72,240.61 : x
  2. Step 2: Convert to fraction form
    113,130.25/155,991.80 = 72,240.61/x
  3. Step 3: Cross multiply
    113,130.25x = 155,991.80 × 72,240.61
  4. Step 4: Simplify right side
    113,130.25x = 11,268,942,787.00
  5. Step 5: Solve for x
    x = 11,268,942,787.00/113,130.25
  6. Step 6: Final answer
    x = 99,610.34

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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.