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Finding the Fourth Proportional to 88,288.99, 131,601.76 and 81,203.11

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Solution

The fourth proportional to 88,288.99, 131,601.76 and 81,203.11 is: 121,039.69

Step by Step Solution

  1. Step 1: Write the proportion equation
    88,288.99 : 131,601.76 = 81,203.11 : x
  2. Step 2: Convert to fraction form
    88,288.99/131,601.76 = 81,203.11/x
  3. Step 3: Cross multiply
    88,288.99x = 131,601.76 × 81,203.11
  4. Step 4: Simplify right side
    88,288.99x = 10,686,472,193.47
  5. Step 5: Solve for x
    x = 10,686,472,193.47/88,288.99
  6. Step 6: Final answer
    x = 121,039.69

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.49) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.