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Finding the Fourth Proportional to 85,573.90, 128,423.92 and 40,595.40

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Solution

The fourth proportional to 85,573.90, 128,423.92 and 40,595.40 is: 60,923.02

Step by Step Solution

  1. Step 1: Write the proportion equation
    85,573.90 : 128,423.92 = 40,595.40 : x
  2. Step 2: Convert to fraction form
    85,573.90/128,423.92 = 40,595.40/x
  3. Step 3: Cross multiply
    85,573.90x = 128,423.92 × 40,595.40
  4. Step 4: Simplify right side
    85,573.90x = 5,213,420,401.97
  5. Step 5: Solve for x
    x = 5,213,420,401.97/85,573.90
  6. Step 6: Final answer
    x = 60,923.02

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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.