Home / 81,144.24-121,816.59-38,490.45

Finding the Fourth Proportional to 81,144.24, 121,816.59 and 38,490.45

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Solution

The fourth proportional to 81,144.24, 121,816.59 and 38,490.45 is: 57,783.22

Step by Step Solution

  1. Step 1: Write the proportion equation
    81,144.24 : 121,816.59 = 38,490.45 : x
  2. Step 2: Convert to fraction form
    81,144.24/121,816.59 = 38,490.45/x
  3. Step 3: Cross multiply
    81,144.24x = 121,816.59 × 38,490.45
  4. Step 4: Simplify right side
    81,144.24x = 4,688,775,366.57
  5. Step 5: Solve for x
    x = 4,688,775,366.57/81,144.24
  6. Step 6: Final answer
    x = 57,783.22

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.