Home / 113,004.88-155,975.40-77,209.36

Finding the Fourth Proportional to 113,004.88, 155,975.40 and 77,209.36

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Solution

The fourth proportional to 113,004.88, 155,975.40 and 77,209.36 is: 106,568.50

Step by Step Solution

  1. Step 1: Write the proportion equation
    113,004.88 : 155,975.40 = 77,209.36 : x
  2. Step 2: Convert to fraction form
    113,004.88/155,975.40 = 77,209.36/x
  3. Step 3: Cross multiply
    113,004.88x = 155,975.40 × 77,209.36
  4. Step 4: Simplify right side
    113,004.88x = 12,042,760,809.74
  5. Step 5: Solve for x
    x = 12,042,760,809.74/113,004.88
  6. Step 6: Final answer
    x = 106,568.50

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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.