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Finding the Fourth Proportional to 128,000.70, 192,043.17 and 60,561.72

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Solution

The fourth proportional to 128,000.70, 192,043.17 and 60,561.72 is: 90,862.51

Step by Step Solution

  1. Step 1: Write the proportion equation
    128,000.70 : 192,043.17 = 60,561.72 : x
  2. Step 2: Convert to fraction form
    128,000.70/192,043.17 = 60,561.72/x
  3. Step 3: Cross multiply
    128,000.70x = 192,043.17 × 60,561.72
  4. Step 4: Simplify right side
    128,000.70x = 11,630,464,689.45
  5. Step 5: Solve for x
    x = 11,630,464,689.45/128,000.70
  6. Step 6: Final answer
    x = 90,862.51

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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.