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Finding the Fourth Proportional to 65,715.70, 98,573.55 and 40,783.90

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Solution

The fourth proportional to 65,715.70, 98,573.55 and 40,783.90 is: 61,175.85

Step by Step Solution

  1. Step 1: Write the proportion equation
    65,715.70 : 98,573.55 = 40,783.90 : x
  2. Step 2: Convert to fraction form
    65,715.70/98,573.55 = 40,783.90/x
  3. Step 3: Cross multiply
    65,715.70x = 98,573.55 × 40,783.90
  4. Step 4: Simplify right side
    65,715.70x = 4,020,213,805.85
  5. Step 5: Solve for x
    x = 4,020,213,805.85/65,715.70
  6. Step 6: Final answer
    x = 61,175.85

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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.