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Finding the Fourth Proportional to 190,915.70, 286,265.55 and 72,590.90

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Solution

The fourth proportional to 190,915.70, 286,265.55 and 72,590.90 is: 108,845.29

Step by Step Solution

  1. Step 1: Write the proportion equation
    190,915.70 : 286,265.55 = 72,590.90 : x
  2. Step 2: Convert to fraction form
    190,915.70/286,265.55 = 72,590.90/x
  3. Step 3: Cross multiply
    190,915.70x = 286,265.55 × 72,590.90
  4. Step 4: Simplify right side
    190,915.70x = 20,780,273,913.50
  5. Step 5: Solve for x
    x = 20,780,273,913.50/190,915.70
  6. Step 6: Final answer
    x = 108,845.29

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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.