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Finding the Fourth Proportional to 145,591.42, 200,915.52 and 81,930.28

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Solution

The fourth proportional to 145,591.42, 200,915.52 and 81,930.28 is: 113,063.43

Step by Step Solution

  1. Step 1: Write the proportion equation
    145,591.42 : 200,915.52 = 81,930.28 : x
  2. Step 2: Convert to fraction form
    145,591.42/200,915.52 = 81,930.28/x
  3. Step 3: Cross multiply
    145,591.42x = 200,915.52 × 81,930.28
  4. Step 4: Simplify right side
    145,591.42x = 16,461,064,809.95
  5. Step 5: Solve for x
    x = 16,461,064,809.95/145,591.42
  6. Step 6: Final answer
    x = 113,063.43

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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.