Home / 90,619.36-125,011.32-63,776.76

Finding the Fourth Proportional to 90,619.36, 125,011.32 and 63,776.76

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Solution

The fourth proportional to 90,619.36, 125,011.32 and 63,776.76 is: 87,981.39

Step by Step Solution

  1. Step 1: Write the proportion equation
    90,619.36 : 125,011.32 = 63,776.76 : x
  2. Step 2: Convert to fraction form
    90,619.36/125,011.32 = 63,776.76/x
  3. Step 3: Cross multiply
    90,619.36x = 125,011.32 × 63,776.76
  4. Step 4: Simplify right side
    90,619.36x = 7,972,816,952.92
  5. Step 5: Solve for x
    x = 7,972,816,952.92/90,619.36
  6. Step 6: Final answer
    x = 87,981.39

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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.