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Finding the Fourth Proportional to 88,915.80, 133,373.70 and 82,435.80

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Solution

The fourth proportional to 88,915.80, 133,373.70 and 82,435.80 is: 123,653.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    88,915.80 : 133,373.70 = 82,435.80 : x
  2. Step 2: Convert to fraction form
    88,915.80/133,373.70 = 82,435.80/x
  3. Step 3: Cross multiply
    88,915.80x = 133,373.70 × 82,435.80
  4. Step 4: Simplify right side
    88,915.80x = 10,994,767,658.46
  5. Step 5: Solve for x
    x = 10,994,767,658.46/88,915.80
  6. Step 6: Final answer
    x = 123,653.70

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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.